diff --git a/coordinator/ui/components/boiler.lua b/coordinator/ui/components/boiler.lua
index 114a0bb..0d651d9 100644
--- a/coordinator/ui/components/boiler.lua
+++ b/coordinator/ui/components/boiler.lua
@@ -12,20 +12,19 @@ local VerticalBar    = require("graphics.elements.indicators.vbar")
 local cpair = core.cpair
 local border = core.border
 
+local text_fg_bg = style.text_colors
+
 -- new boiler view
 ---@param root graphics_element parent
 ---@param x integer top left x
 ---@param y integer top left y
 ---@param ps psil ps interface
 local function new_view(root, x, y, ps)
-    local boiler = Rectangle{parent=root,border=border(1, colors.gray, true),width=31,height=7,x=x,y=y}
-
-    local text_fg_bg = cpair(colors.black, colors.lightGray)
-    local lu_col = cpair(colors.gray, colors.gray)
+    local boiler = Rectangle{parent=root,border=border(1,colors.gray,true),width=31,height=7,x=x,y=y}
 
     local status = StateIndicator{parent=boiler,x=9,y=1,states=style.boiler.states,value=1,min_width=12}
-    local temp   = DataIndicator{parent=boiler,x=5,y=3,lu_colors=lu_col,label="Temp:",unit="K",format="%10.2f",value=0,width=22,fg_bg=text_fg_bg}
-    local boil_r = DataIndicator{parent=boiler,x=5,y=4,lu_colors=lu_col,label="Boil:",unit="mB/t",format="%10.0f",value=0,commas=true,width=22,fg_bg=text_fg_bg}
+    local temp   = DataIndicator{parent=boiler,x=5,y=3,lu_colors=style.lu_col,label="Temp:",unit="K",format="%10.2f",value=0,width=22,fg_bg=text_fg_bg}
+    local boil_r = DataIndicator{parent=boiler,x=5,y=4,lu_colors=style.lu_col,label="Boil:",unit="mB/t",format="%10.0f",value=0,commas=true,width=22,fg_bg=text_fg_bg}
 
     status.register(ps, "computed_status", status.update)
     temp.register(ps, "temperature", temp.update)
diff --git a/coordinator/ui/components/imatrix.lua b/coordinator/ui/components/imatrix.lua
index 2d553a5..d15362c 100644
--- a/coordinator/ui/components/imatrix.lua
+++ b/coordinator/ui/components/imatrix.lua
@@ -18,6 +18,9 @@ local border = core.border
 
 local TEXT_ALIGN = core.TEXT_ALIGN
 
+local text_fg_bg = style.text_colors
+local lu_col = style.lu_colors
+
 -- new induction matrix view
 ---@param root graphics_element parent
 ---@param x integer top left x
@@ -31,14 +34,12 @@ local function new_view(root, x, y, data, ps, id)
 
     local matrix = Div{parent=root,fg_bg=style.root,width=33,height=24,x=x,y=y}
 
-    TextBox{parent=matrix,text=" ",width=33,height=1,x=1,y=1,fg_bg=cpair(colors.lightGray,colors.gray)}
-    TextBox{parent=matrix,text=title,alignment=TEXT_ALIGN.CENTER,width=33,height=1,x=1,y=2,fg_bg=cpair(colors.lightGray,colors.gray)}
+    TextBox{parent=matrix,text=" ",width=33,height=1,x=1,y=1,fg_bg=style.lg_gray}
+    TextBox{parent=matrix,text=title,alignment=TEXT_ALIGN.CENTER,width=33,height=1,x=1,y=2,fg_bg=style.lg_gray}
 
     local rect = Rectangle{parent=matrix,border=border(1,colors.gray,true),width=33,height=22,x=1,y=3}
 
-    local text_fg_bg = cpair(colors.black, colors.lightGray)
     local label_fg_bg = cpair(colors.gray, colors.lightGray)
-    local lu_col = cpair(colors.gray, colors.gray)
 
     local status   = StateIndicator{parent=rect,x=10,y=1,states=style.imatrix.states,value=1,min_width=14}
     local energy   = PowerIndicator{parent=rect,x=7,y=3,lu_colors=lu_col,label="Energy:  ",format="%8.2f",value=0,width=26,fg_bg=text_fg_bg}
diff --git a/coordinator/ui/components/pkt_entry.lua b/coordinator/ui/components/pkt_entry.lua
index 8ba805c..ac38a9c 100644
--- a/coordinator/ui/components/pkt_entry.lua
+++ b/coordinator/ui/components/pkt_entry.lua
@@ -4,6 +4,8 @@
 
 local iocontrol     = require("coordinator.iocontrol")
 
+local style         = require("coordinator.ui.style")
+
 local core          = require("graphics.core")
 
 local Div           = require("graphics.elements.div")
@@ -15,6 +17,9 @@ local TEXT_ALIGN = core.TEXT_ALIGN
 
 local cpair = core.cpair
 
+local text_fg_bg = style.text_colors
+local lg_wh = style.lg_white
+
 -- create a pocket list entry
 ---@param parent graphics_element parent
 ---@param id integer PKT session ID
@@ -23,22 +28,22 @@ local function init(parent, id)
 
     -- root div
     local root = Div{parent=parent,x=2,y=2,height=4,width=parent.get_width()-2,hidden=true}
-    local entry = Div{parent=root,x=2,y=1,height=3,fg_bg=cpair(colors.black,colors.white)}
+    local entry = Div{parent=root,x=2,y=1,height=3,fg_bg=style.bw_fg_bg}
 
     local ps_prefix = "pkt_" .. id .. "_"
 
-    TextBox{parent=entry,x=1,y=1,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
-    local pkt_addr = TextBox{parent=entry,x=1,y=2,text="@ C ??",alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray),nav_active=cpair(colors.gray,colors.black)}
-    TextBox{parent=entry,x=1,y=3,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
+    TextBox{parent=entry,x=1,y=1,text="",width=8,height=1,fg_bg=text_fg_bg}
+    local pkt_addr = TextBox{parent=entry,x=1,y=2,text="@ C ??",alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=text_fg_bg,nav_active=cpair(colors.gray,colors.black)}
+    TextBox{parent=entry,x=1,y=3,text="",width=8,height=1,fg_bg=text_fg_bg}
     pkt_addr.register(ps, ps_prefix .. "addr", pkt_addr.set_value)
 
     TextBox{parent=entry,x=10,y=2,text="FW:",width=3,height=1}
-    local pkt_fw_v = TextBox{parent=entry,x=14,y=2,text=" ------- ",width=20,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local pkt_fw_v = TextBox{parent=entry,x=14,y=2,text=" ------- ",width=20,height=1,fg_bg=lg_wh}
     pkt_fw_v.register(ps, ps_prefix .. "fw", pkt_fw_v.set_value)
 
     TextBox{parent=entry,x=35,y=2,text="RTT:",width=4,height=1}
-    local pkt_rtt = DataIndicator{parent=entry,x=40,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=cpair(colors.lightGray,colors.white)}
-    TextBox{parent=entry,x=46,y=2,text="ms",width=4,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local pkt_rtt = DataIndicator{parent=entry,x=40,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=lg_wh}
+    TextBox{parent=entry,x=46,y=2,text="ms",width=4,height=1,fg_bg=lg_wh}
     pkt_rtt.register(ps, ps_prefix .. "rtt", pkt_rtt.update)
     pkt_rtt.register(ps, ps_prefix .. "rtt_color", pkt_rtt.recolor)
 
diff --git a/coordinator/ui/components/process_ctl.lua b/coordinator/ui/components/process_ctl.lua
index a8a46e7..4c69b87 100644
--- a/coordinator/ui/components/process_ctl.lua
+++ b/coordinator/ui/components/process_ctl.lua
@@ -33,6 +33,8 @@ local lu_cpair = style.lu_colors
 local hzd_fg_bg  = style.hzd_fg_bg
 local dis_colors = style.dis_colors
 
+local gry_wht = style.gray_white
+
 local ind_grn = style.ind_grn
 local ind_yel = style.ind_yel
 local ind_red = style.ind_red
@@ -47,6 +49,10 @@ local period = core.flasher.PERIOD
 local function new_view(root, x, y)
     assert(root.get_height() >= (y + 24), "main display not of sufficient vertical resolution (add an additional row of monitors)")
 
+    local black = cpair(colors.black, colors.black)
+    local blk_brn = cpair(colors.black, colors.brown)
+    local blk_pur = cpair(colors.black, colors.purple)
+
     local facility = iocontrol.get_db().facility
     local units = iocontrol.get_db().units
 
@@ -116,35 +122,35 @@ local function new_view(root, x, y)
 
     local targets = Div{parent=proc,width=31,height=24,x=1,y=1}
 
-    local burn_tag = Div{parent=targets,x=1,y=1,width=8,height=4,fg_bg=cpair(colors.black,colors.purple)}
+    local burn_tag = Div{parent=targets,x=1,y=1,width=8,height=4,fg_bg=blk_pur}
     TextBox{parent=burn_tag,x=2,y=2,text="Burn Target",width=7,height=2}
 
-    local burn_target = Div{parent=targets,x=9,y=1,width=23,height=3,fg_bg=cpair(colors.gray,colors.white)}
-    local b_target = SpinboxNumeric{parent=burn_target,x=11,y=1,whole_num_precision=4,fractional_precision=1,min=0.1,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=bw_fg_bg}
+    local burn_target = Div{parent=targets,x=9,y=1,width=23,height=3,fg_bg=gry_wht}
+    local b_target = SpinboxNumeric{parent=burn_target,x=11,y=1,whole_num_precision=4,fractional_precision=1,min=0.1,arrow_fg_bg=gry_wht,fg_bg=bw_fg_bg}
     TextBox{parent=burn_target,x=18,y=2,text="mB/t"}
-    local burn_sum = DataIndicator{parent=targets,x=9,y=4,label="",format="%18.1f",value=0,unit="mB/t",commas=true,lu_colors=cpair(colors.black,colors.black),width=23,fg_bg=cpair(colors.black,colors.brown)}
+    local burn_sum = DataIndicator{parent=targets,x=9,y=4,label="",format="%18.1f",value=0,unit="mB/t",commas=true,lu_colors=black,width=23,fg_bg=blk_brn}
 
     b_target.register(facility.ps, "process_burn_target", b_target.set_value)
     burn_sum.register(facility.ps, "burn_sum", burn_sum.update)
 
-    local chg_tag = Div{parent=targets,x=1,y=6,width=8,height=4,fg_bg=cpair(colors.black,colors.purple)}
+    local chg_tag = Div{parent=targets,x=1,y=6,width=8,height=4,fg_bg=blk_pur}
     TextBox{parent=chg_tag,x=2,y=2,text="Charge Target",width=7,height=2}
 
-    local chg_target = Div{parent=targets,x=9,y=6,width=23,height=3,fg_bg=cpair(colors.gray,colors.white)}
-    local c_target = SpinboxNumeric{parent=chg_target,x=2,y=1,whole_num_precision=15,fractional_precision=0,min=0,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=bw_fg_bg}
+    local chg_target = Div{parent=targets,x=9,y=6,width=23,height=3,fg_bg=gry_wht}
+    local c_target = SpinboxNumeric{parent=chg_target,x=2,y=1,whole_num_precision=15,fractional_precision=0,min=0,arrow_fg_bg=gry_wht,fg_bg=bw_fg_bg}
     TextBox{parent=chg_target,x=18,y=2,text="MFE"}
-    local cur_charge = DataIndicator{parent=targets,x=9,y=9,label="",format="%19d",value=0,unit="MFE",commas=true,lu_colors=cpair(colors.black,colors.black),width=23,fg_bg=cpair(colors.black,colors.brown)}
+    local cur_charge = DataIndicator{parent=targets,x=9,y=9,label="",format="%19d",value=0,unit="MFE",commas=true,lu_colors=black,width=23,fg_bg=blk_brn}
 
     c_target.register(facility.ps, "process_charge_target", c_target.set_value)
     cur_charge.register(facility.induction_ps_tbl[1], "energy", function (j) cur_charge.update(util.joules_to_fe(j) / 1000000) end)
 
-    local gen_tag = Div{parent=targets,x=1,y=11,width=8,height=4,fg_bg=cpair(colors.black,colors.purple)}
+    local gen_tag = Div{parent=targets,x=1,y=11,width=8,height=4,fg_bg=blk_pur}
     TextBox{parent=gen_tag,x=2,y=2,text="Gen. Target",width=7,height=2}
 
-    local gen_target = Div{parent=targets,x=9,y=11,width=23,height=3,fg_bg=cpair(colors.gray,colors.white)}
-    local g_target = SpinboxNumeric{parent=gen_target,x=8,y=1,whole_num_precision=9,fractional_precision=0,min=0,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=bw_fg_bg}
+    local gen_target = Div{parent=targets,x=9,y=11,width=23,height=3,fg_bg=gry_wht}
+    local g_target = SpinboxNumeric{parent=gen_target,x=8,y=1,whole_num_precision=9,fractional_precision=0,min=0,arrow_fg_bg=gry_wht,fg_bg=bw_fg_bg}
     TextBox{parent=gen_target,x=18,y=2,text="kFE/t"}
-    local cur_gen = DataIndicator{parent=targets,x=9,y=14,label="",format="%17d",value=0,unit="kFE/t",commas=true,lu_colors=cpair(colors.black,colors.black),width=23,fg_bg=cpair(colors.black,colors.brown)}
+    local cur_gen = DataIndicator{parent=targets,x=9,y=14,label="",format="%17d",value=0,unit="kFE/t",commas=true,lu_colors=black,width=23,fg_bg=blk_brn}
 
     g_target.register(facility.ps, "process_gen_target", g_target.set_value)
     cur_gen.register(facility.induction_ps_tbl[1], "last_input", function (j) cur_gen.update(util.round(util.joules_to_fe(j) / 1000)) end)
@@ -159,10 +165,10 @@ local function new_view(root, x, y)
 
     for i = 1, 4 do
         local unit
-        local tag_fg_bg = cpair(colors.gray,colors.white)
-        local lim_fg_bg = cpair(colors.lightGray,colors.white)
+        local tag_fg_bg = gry_wht
+        local lim_fg_bg = style.lg_white
         local ctl_fg    = colors.lightGray
-        local cur_fg_bg = cpair(colors.lightGray,colors.white)
+        local cur_fg_bg = style.lg_white
         local cur_lu    = colors.lightGray
 
         if i <= facility.num_units then
@@ -170,7 +176,7 @@ local function new_view(root, x, y)
             tag_fg_bg = cpair(colors.black,colors.lightBlue)
             lim_fg_bg = bw_fg_bg
             ctl_fg    = colors.gray
-            cur_fg_bg = cpair(colors.black,colors.brown)
+            cur_fg_bg = blk_brn
             cur_lu    = colors.black
         end
 
@@ -180,7 +186,7 @@ local function new_view(root, x, y)
         TextBox{parent=unit_tag,x=2,y=2,text="Unit "..i.." Limit",width=7,height=2}
 
         local lim_ctl = Div{parent=limit_div,x=9,y=_y,width=14,height=3,fg_bg=cpair(ctl_fg,colors.white)}
-        local lim = SpinboxNumeric{parent=lim_ctl,x=2,y=1,whole_num_precision=4,fractional_precision=1,min=0.1,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=lim_fg_bg}
+        local lim = SpinboxNumeric{parent=lim_ctl,x=2,y=1,whole_num_precision=4,fractional_precision=1,min=0.1,arrow_fg_bg=gry_wht,fg_bg=lim_fg_bg}
         TextBox{parent=lim_ctl,x=9,y=2,text="mB/t",width=4,height=1}
 
         local cur_burn = DataIndicator{parent=limit_div,x=9,y=_y+3,label="",format="%7.1f",value=0,unit="mB/t",commas=false,lu_colors=cpair(cur_lu,cur_lu),width=14,fg_bg=cur_fg_bg}
@@ -203,8 +209,8 @@ local function new_view(root, x, y)
     local stat_div = Div{parent=proc,width=22,height=24,x=57,y=6}
 
     for i = 1, 4 do
-        local tag_fg_bg = cpair(colors.gray, colors.white)
-        local ind_fg_bg = cpair(colors.lightGray, colors.white)
+        local tag_fg_bg = gry_wht
+        local ind_fg_bg = style.lg_white
         local ind_off = colors.lightGray
 
         if i <= facility.num_units then
@@ -241,12 +247,12 @@ local function new_view(root, x, y)
 
     local u_stat = Rectangle{parent=proc,border=border(1,colors.gray,true),thin=true,width=31,height=4,x=1,y=16,fg_bg=bw_fg_bg}
     local stat_line_1 = TextBox{parent=u_stat,x=1,y=1,text="UNKNOWN",width=31,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=bw_fg_bg}
-    local stat_line_2 = TextBox{parent=u_stat,x=1,y=2,text="awaiting data...",width=31,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=cpair(colors.gray, colors.white)}
+    local stat_line_2 = TextBox{parent=u_stat,x=1,y=2,text="awaiting data...",width=31,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=gry_wht}
 
     stat_line_1.register(facility.ps, "status_line_1", stat_line_1.set_value)
     stat_line_2.register(facility.ps, "status_line_2", stat_line_2.set_value)
 
-    local auto_controls = Div{parent=proc,x=1,y=20,width=31,height=5,fg_bg=cpair(colors.gray,colors.white)}
+    local auto_controls = Div{parent=proc,x=1,y=20,width=31,height=5,fg_bg=gry_wht}
 
     -- save the automatic process control configuration without starting
     local function _save_cfg()
@@ -321,7 +327,7 @@ local function new_view(root, x, y)
 
     local waste_sel = Div{parent=proc,width=21,height=24,x=81,y=1}
 
-    TextBox{parent=waste_sel,text=" ",width=21,height=1,x=1,y=1,fg_bg=cpair(colors.black,colors.brown)}
+    TextBox{parent=waste_sel,text=" ",width=21,height=1,x=1,y=1,fg_bg=blk_brn}
     TextBox{parent=waste_sel,text="WASTE PRODUCTION",alignment=TEXT_ALIGN.CENTER,width=21,height=1,x=1,y=2,fg_bg=cpair(colors.lightGray,colors.brown)}
 
     local rect   = Rectangle{parent=waste_sel,border=border(1,colors.brown,true),width=21,height=22,x=1,y=3}
diff --git a/coordinator/ui/components/reactor.lua b/coordinator/ui/components/reactor.lua
index b4a2c1b..c74ab0a 100644
--- a/coordinator/ui/components/reactor.lua
+++ b/coordinator/ui/components/reactor.lua
@@ -14,6 +14,9 @@ local StateIndicator = require("graphics.elements.indicators.state")
 local cpair = core.cpair
 local border = core.border
 
+local text_fg_bg = style.text_colors
+local lu_col = style.lu_colors
+
 -- create new reactor view
 ---@param root graphics_element parent
 ---@param x integer top left x
@@ -22,9 +25,6 @@ local border = core.border
 local function new_view(root, x, y, ps)
     local reactor = Rectangle{parent=root,border=border(1, colors.gray, true),width=30,height=7,x=x,y=y}
 
-    local text_fg_bg = cpair(colors.black, colors.lightGray)
-    local lu_col = cpair(colors.gray, colors.gray)
-
     local status    = StateIndicator{parent=reactor,x=6,y=1,states=style.reactor.states,value=1,min_width=16}
     local core_temp = DataIndicator{parent=reactor,x=2,y=3,lu_colors=lu_col,label="Core Temp:",unit="K",format="%10.2f",value=0,width=26,fg_bg=text_fg_bg}
     local burn_r    = DataIndicator{parent=reactor,x=2,y=4,lu_colors=lu_col,label="Burn Rate:",unit="mB/t",format="%10.2f",value=0,width=26,fg_bg=text_fg_bg}
diff --git a/coordinator/ui/components/turbine.lua b/coordinator/ui/components/turbine.lua
index 7bd4405..d8b2e17 100644
--- a/coordinator/ui/components/turbine.lua
+++ b/coordinator/ui/components/turbine.lua
@@ -15,16 +15,16 @@ local VerticalBar    = require("graphics.elements.indicators.vbar")
 local cpair = core.cpair
 local border = core.border
 
+local text_fg_bg = style.text_colors
+local lu_col = style.lu_colors
+
 -- new turbine view
 ---@param root graphics_element parent
 ---@param x integer top left x
 ---@param y integer top left y
 ---@param ps psil ps interface
 local function new_view(root, x, y, ps)
-    local turbine = Rectangle{parent=root,border=border(1, colors.gray, true),width=23,height=7,x=x,y=y}
-
-    local text_fg_bg = cpair(colors.black, colors.lightGray)
-    local lu_col = cpair(colors.gray, colors.gray)
+    local turbine = Rectangle{parent=root,border=border(1,colors.gray,true),width=23,height=7,x=x,y=y}
 
     local status    = StateIndicator{parent=turbine,x=7,y=1,states=style.turbine.states,value=1,min_width=12}
     local prod_rate = PowerIndicator{parent=turbine,x=5,y=3,lu_colors=lu_col,label="",format="%10.2f",value=0,rate=true,width=16,fg_bg=text_fg_bg}
diff --git a/coordinator/ui/components/unit_detail.lua b/coordinator/ui/components/unit_detail.lua
index 985e577..fe98727 100644
--- a/coordinator/ui/components/unit_detail.lua
+++ b/coordinator/ui/components/unit_detail.lua
@@ -2,6 +2,8 @@
 -- Reactor Unit SCADA Coordinator GUI
 --
 
+local types             = require("scada-common.types")
+
 local iocontrol         = require("coordinator.iocontrol")
 
 local style             = require("coordinator.ui.style")
@@ -34,6 +36,9 @@ local border = core.border
 local bw_fg_bg = style.bw_fg_bg
 local lu_cpair = style.lu_colors
 local hzd_fg_bg = style.hzd_fg_bg
+local dis_colors = style.dis_colors
+
+local gry_wht = style.gray_white
 
 local ind_grn = style.ind_grn
 local ind_yel = style.ind_yel
@@ -93,7 +98,7 @@ local function init(parent, id)
     waste.register(u_ps, "waste_fill", waste.update)
 
     ccool.register(u_ps, "ccool_type", function (type)
-        if type == "mekanism:sodium" then
+        if type == types.FLUID.SODIUM then
             ccool.recolor(cpair(colors.lightBlue, colors.gray))
         else
             ccool.recolor(cpair(colors.blue, colors.gray))
@@ -101,7 +106,7 @@ local function init(parent, id)
     end)
 
     hcool.register(u_ps, "hcool_type", function (type)
-        if type == "mekanism:superheated_sodium" then
+        if type == types.FLUID.SUPERHEATED_SODIUM then
             hcool.recolor(cpair(colors.orange, colors.gray))
         else
             hcool.recolor(cpair(colors.white, colors.gray))
@@ -130,7 +135,7 @@ local function init(parent, id)
 
     local u_stat = Rectangle{parent=main,border=border(1,colors.gray,true),thin=true,width=33,height=4,x=46,y=3,fg_bg=bw_fg_bg}
     local stat_line_1 = TextBox{parent=u_stat,x=1,y=1,text="UNKNOWN",width=33,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=bw_fg_bg}
-    local stat_line_2 = TextBox{parent=u_stat,x=1,y=2,text="awaiting data...",width=33,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=cpair(colors.gray, colors.white)}
+    local stat_line_2 = TextBox{parent=u_stat,x=1,y=2,text="awaiting data...",width=33,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=gry_wht}
 
     stat_line_1.register(u_ps, "U_StatusLine1", stat_line_1.set_value)
     stat_line_2.register(u_ps, "U_StatusLine2", stat_line_2.set_value)
@@ -341,10 +346,8 @@ local function init(parent, id)
     -- reactor controls --
     ----------------------
 
-    local dis_colors = cpair(colors.white, colors.lightGray)
-
-    local burn_control = Div{parent=main,x=12,y=28,width=19,height=3,fg_bg=cpair(colors.gray,colors.white)}
-    local burn_rate = SpinboxNumeric{parent=burn_control,x=2,y=1,whole_num_precision=4,fractional_precision=1,min=0.1,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=bw_fg_bg}
+    local burn_control = Div{parent=main,x=12,y=28,width=19,height=3,fg_bg=gry_wht}
+    local burn_rate = SpinboxNumeric{parent=burn_control,x=2,y=1,whole_num_precision=4,fractional_precision=1,min=0.1,arrow_fg_bg=gry_wht,fg_bg=bw_fg_bg}
     TextBox{parent=burn_control,x=9,y=2,text="mB/t"}
 
     local set_burn = function () unit.set_burn(burn_rate.get_value()) end
@@ -480,7 +483,7 @@ local function init(parent, id)
     auto_div.line_break()
 
     local function set_group() unit.set_group(group.get_value() - 1) end
-    local set_grp_btn = PushButton{parent=auto_div,text="SET",x=4,min_width=5,fg_bg=cpair(colors.black,colors.yellow),active_fg_bg=style.wh_gray,dis_fg_bg=cpair(colors.gray,colors.white),callback=set_group}
+    local set_grp_btn = PushButton{parent=auto_div,text="SET",x=4,min_width=5,fg_bg=cpair(colors.black,colors.yellow),active_fg_bg=style.wh_gray,dis_fg_bg=gry_wht,callback=set_group}
 
     auto_div.line_break()
 
diff --git a/coordinator/ui/components/unit_flow.lua b/coordinator/ui/components/unit_flow.lua
index 2f371f5..681761b 100644
--- a/coordinator/ui/components/unit_flow.lua
+++ b/coordinator/ui/components/unit_flow.lua
@@ -31,6 +31,7 @@ local wh_gray = style.wh_gray
 local bw_fg_bg = style.bw_fg_bg
 local text_c = style.text_colors
 local lu_c = style.lu_colors
+local lg_gray = style.lg_gray
 
 local ind_grn = style.ind_grn
 local ind_wht = style.ind_wht
@@ -64,8 +65,6 @@ local function make(parent, x, y, wide, unit)
     -- bounding box div
     local root = Div{parent=parent,x=x,y=y,width=_wide(136, 114),height=height}
 
-    local lg_gray = cpair(colors.lightGray, colors.gray)
-
     ------------------
     -- COOLING LOOP --
     ------------------
diff --git a/coordinator/ui/layout/flow_view.lua b/coordinator/ui/layout/flow_view.lua
index 99611a1..69f4c8a 100644
--- a/coordinator/ui/layout/flow_view.lua
+++ b/coordinator/ui/layout/flow_view.lua
@@ -261,7 +261,7 @@ local function init(main)
         if tank_defs[i] > 0 then
             local vy = 3 + y_ofs(i)
 
-            TextBox{parent=main,x=12,y=vy,text="\x10\x11",fg_bg=cpair(colors.black,colors.lightGray),width=2,height=1}
+            TextBox{parent=main,x=12,y=vy,text="\x10\x11",fg_bg=text_col,width=2,height=1}
 
             local conn = IndicatorLight{parent=main,x=9,y=vy+1,label=util.sprintf("PV%02d-EMC", i * 5),colors=style.ind_grn}
             local open = IndicatorLight{parent=main,x=9,y=vy+2,label="OPEN",colors=style.ind_wht}
@@ -288,7 +288,7 @@ local function init(main)
 
             local tank = Div{parent=main,x=3,y=7+y_offset,width=20,height=14}
 
-            TextBox{parent=tank,text=" ",height=1,x=1,y=1,fg_bg=cpair(colors.lightGray,colors.gray)}
+            TextBox{parent=tank,text=" ",height=1,x=1,y=1,fg_bg=style.lg_gray}
             TextBox{parent=tank,text="DYNAMIC TANK "..id,alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.wh_gray}
 
             local tank_box = Rectangle{parent=tank,border=border(1,colors.gray,true),width=20,height=12}
@@ -338,7 +338,7 @@ local function init(main)
 
     local sps = Div{parent=main,x=140,y=3,height=12}
 
-    TextBox{parent=sps,text=" ",width=24,height=1,x=1,y=1,fg_bg=cpair(colors.lightGray,colors.gray)}
+    TextBox{parent=sps,text=" ",width=24,height=1,x=1,y=1,fg_bg=style.lg_gray}
     TextBox{parent=sps,text="SPS",alignment=TEXT_ALIGN.CENTER,width=24,height=1,fg_bg=wh_gray}
 
     local sps_box = Rectangle{parent=sps,border=border(1,colors.gray,true),width=24,height=10}
diff --git a/coordinator/ui/layout/front_panel.lua b/coordinator/ui/layout/front_panel.lua
index 11fe172..1bfa046 100644
--- a/coordinator/ui/layout/front_panel.lua
+++ b/coordinator/ui/layout/front_panel.lua
@@ -2,32 +2,34 @@
 -- Coordinator Front Panel GUI
 --
 
-local types         = require("scada-common.types")
-local util          = require("scada-common.util")
+local types     = require("scada-common.types")
+local util      = require("scada-common.util")
 
-local iocontrol     = require("coordinator.iocontrol")
+local iocontrol = require("coordinator.iocontrol")
 
-local pgi           = require("coordinator.ui.pgi")
-local style         = require("coordinator.ui.style")
+local pgi       = require("coordinator.ui.pgi")
+local style     = require("coordinator.ui.style")
 
-local pkt_entry     = require("coordinator.ui.components.pkt_entry")
+local pkt_entry = require("coordinator.ui.components.pkt_entry")
 
-local core          = require("graphics.core")
+local core      = require("graphics.core")
 
-local Div           = require("graphics.elements.div")
-local ListBox       = require("graphics.elements.listbox")
-local MultiPane     = require("graphics.elements.multipane")
-local TextBox       = require("graphics.elements.textbox")
+local Div       = require("graphics.elements.div")
+local ListBox   = require("graphics.elements.listbox")
+local MultiPane = require("graphics.elements.multipane")
+local TextBox   = require("graphics.elements.textbox")
 
-local TabBar        = require("graphics.elements.controls.tabbar")
+local TabBar    = require("graphics.elements.controls.tabbar")
 
-local LED           = require("graphics.elements.indicators.led")
-local RGBLED        = require("graphics.elements.indicators.ledrgb")
+local LED       = require("graphics.elements.indicators.led")
+local RGBLED    = require("graphics.elements.indicators.ledrgb")
 
 local TEXT_ALIGN = core.TEXT_ALIGN
 
 local cpair = core.cpair
 
+local led_grn = style.led_grn
+
 -- create new front panel view
 ---@param panel graphics_element main displaybox
 ---@param num_units integer number of units (number of unit monitors)
@@ -47,13 +49,13 @@ local function init(panel, num_units)
     local system = Div{parent=main_page,width=14,height=17,x=2,y=2}
 
     local status = LED{parent=system,label="STATUS",colors=cpair(colors.green,colors.red)}
-    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=cpair(colors.green,colors.green_off)}
+    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=led_grn}
     status.update(true)
     system.line_break()
 
     heartbeat.register(ps, "heartbeat", heartbeat.update)
 
-    local modem = LED{parent=system,label="MODEM",colors=cpair(colors.green,colors.green_off)}
+    local modem = LED{parent=system,label="MODEM",colors=led_grn}
     local network = RGBLED{parent=system,label="NETWORK",colors={colors.green,colors.red,colors.orange,colors.yellow,colors.gray}}
     network.update(types.PANEL_LINK_STATE.DISCONNECTED)
     system.line_break()
@@ -61,25 +63,25 @@ local function init(panel, num_units)
     modem.register(ps, "has_modem", modem.update)
     network.register(ps, "link_state", network.update)
 
-    local speaker = LED{parent=system,label="SPEAKER",colors=cpair(colors.green,colors.green_off)}
+    local speaker = LED{parent=system,label="SPEAKER",colors=led_grn}
     speaker.register(ps, "has_speaker", speaker.update)
 
 ---@diagnostic disable-next-line: undefined-field
     local comp_id = util.sprintf("(%d)", os.getComputerID())
-    TextBox{parent=system,x=9,y=4,width=6,height=1,text=comp_id,fg_bg=cpair(colors.lightGray,colors.ivory)}
+    TextBox{parent=system,x=9,y=4,width=6,height=1,text=comp_id,fg_bg=style.fp_label}
 
     local monitors = Div{parent=main_page,width=16,height=17,x=18,y=2}
 
-    local main_monitor = LED{parent=monitors,label="MAIN MONITOR",colors=cpair(colors.green,colors.green_off)}
+    local main_monitor = LED{parent=monitors,label="MAIN MONITOR",colors=led_grn}
     main_monitor.register(ps, "main_monitor", main_monitor.update)
 
-    local flow_monitor = LED{parent=monitors,label="FLOW MONITOR",colors=cpair(colors.green,colors.green_off)}
+    local flow_monitor = LED{parent=monitors,label="FLOW MONITOR",colors=led_grn}
     flow_monitor.register(ps, "flow_monitor", flow_monitor.update)
 
     monitors.line_break()
 
     for i = 1, num_units do
-        local unit_monitor = LED{parent=monitors,label="UNIT "..i.." MONITOR",colors=cpair(colors.green,colors.green_off)}
+        local unit_monitor = LED{parent=monitors,label="UNIT "..i.." MONITOR",colors=led_grn}
         unit_monitor.register(ps, "unit_monitor_" .. i, unit_monitor.update)
     end
 
@@ -87,7 +89,7 @@ local function init(panel, num_units)
     -- about footer
     --
 
-    local about   = Div{parent=main_page,width=15,height=3,x=1,y=16,fg_bg=cpair(colors.lightGray,colors.ivory)}
+    local about   = Div{parent=main_page,width=15,height=3,x=1,y=16,fg_bg=style.fp_label}
     local fw_v    = TextBox{parent=about,x=1,y=1,text="FW: v00.00.00",alignment=TEXT_ALIGN.LEFT,height=1}
     local comms_v = TextBox{parent=about,x=1,y=2,text="NT: v00.00.00",alignment=TEXT_ALIGN.LEFT,height=1}
 
@@ -101,7 +103,7 @@ local function init(panel, num_units)
     -- API page
 
     local api_page = Div{parent=page_div,x=1,y=1,hidden=true}
-    local api_list = ListBox{parent=api_page,x=1,y=1,height=17,width=51,scroll_height=1000,fg_bg=cpair(colors.black,colors.ivory),nav_fg_bg=cpair(colors.gray,colors.lightGray),nav_active=cpair(colors.black,colors.gray)}
+    local api_list = ListBox{parent=api_page,x=1,y=1,height=17,width=51,scroll_height=1000,fg_bg=style.fp_text,nav_fg_bg=cpair(colors.gray,colors.lightGray),nav_active=cpair(colors.black,colors.gray)}
     local _ = Div{parent=api_list,height=1,hidden=true} -- padding
 
     -- assemble page panes
@@ -111,11 +113,11 @@ local function init(panel, num_units)
     local page_pane = MultiPane{parent=page_div,x=1,y=1,panes=panes}
 
     local tabs = {
-        { name = "CRD", color = cpair(colors.black, colors.ivory) },
-        { name = "API", color = cpair(colors.black, colors.ivory) },
+        { name = "CRD", color = style.fp_text },
+        { name = "API", color = style.fp_text },
     }
 
-    TabBar{parent=panel,y=2,tabs=tabs,min_width=9,callback=page_pane.set_value,fg_bg=cpair(colors.black,colors.white)}
+    TabBar{parent=panel,y=2,tabs=tabs,min_width=9,callback=page_pane.set_value,fg_bg=style.bw_fg_bg}
 
     -- link pocket API list management to PGI
     pgi.link_elements(api_list, pkt_entry)
diff --git a/coordinator/ui/layout/main_view.lua b/coordinator/ui/layout/main_view.lua
index c0e2769..34cbc59 100644
--- a/coordinator/ui/layout/main_view.lua
+++ b/coordinator/ui/layout/main_view.lua
@@ -28,7 +28,7 @@ local function init(main)
 
     -- window header message
     local header = TextBox{parent=main,y=1,text="Nuclear Generation Facility SCADA Coordinator",alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.header}
-    local ping = DataIndicator{parent=main,x=1,y=1,label="SVTT",format="%d",value=0,unit="ms",lu_colors=cpair(colors.lightGray, colors.white),width=12,fg_bg=style.header}
+    local ping = DataIndicator{parent=main,x=1,y=1,label="SVTT",format="%d",value=0,unit="ms",lu_colors=style.lg_white,width=12,fg_bg=style.header}
     -- max length example: "01:23:45 AM - Wednesday, September 28 2022"
     local datetime = TextBox{parent=main,x=(header.get_width()-42),y=1,text="",alignment=TEXT_ALIGN.RIGHT,width=42,height=1,fg_bg=style.header}
 
@@ -75,7 +75,7 @@ local function init(main)
 
     assert(cnc_bottom_align_start >= cnc_y_start, "main display not of sufficient vertical resolution (add an additional row of monitors)")
 
-    TextBox{parent=main,y=cnc_bottom_align_start,text=string.rep("\x8c", header.get_width()),alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=cpair(colors.lightGray,colors.gray)}
+    TextBox{parent=main,y=cnc_bottom_align_start,text=string.rep("\x8c", header.get_width()),alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.lg_gray}
 
     cnc_bottom_align_start = cnc_bottom_align_start + 2
 
diff --git a/coordinator/ui/style.lua b/coordinator/ui/style.lua
index ad23989..d9549a5 100644
--- a/coordinator/ui/style.lua
+++ b/coordinator/ui/style.lua
@@ -78,11 +78,19 @@ style.lu_colors = cpair(colors.gray, colors.gray)
 style.hzd_fg_bg  = style.wh_gray
 style.dis_colors = cpair(colors.white, colors.lightGray)
 
+style.lg_gray = cpair(colors.lightGray, colors.gray)
+style.lg_white = cpair(colors.lightGray, colors.white)
+style.gray_white = cpair(colors.gray, colors.white)
+
 style.ind_grn = cpair(colors.green, colors.gray)
 style.ind_yel = cpair(colors.yellow, colors.gray)
 style.ind_red = cpair(colors.red, colors.gray)
 style.ind_wht = style.wh_gray
 
+style.fp_text = cpair(colors.black, colors.ivory)
+style.fp_label = cpair(colors.lightGray, colors.ivory)
+style.led_grn = cpair(colors.green, colors.green_off)
+
 -- UI COMPONENTS --
 
 style.reactor = {
diff --git a/reactor-plc/panel/front_panel.lua b/reactor-plc/panel/front_panel.lua
index 91f8651..a59a016 100644
--- a/reactor-plc/panel/front_panel.lua
+++ b/reactor-plc/panel/front_panel.lua
@@ -28,6 +28,9 @@ local TEXT_ALIGN = core.TEXT_ALIGN
 local cpair = core.cpair
 local border = core.border
 
+local ind_grn = style.ind_grn
+local ind_red = style.ind_red
+
 -- create new front panel view
 ---@param panel graphics_element main displaybox
 local function init(panel)
@@ -41,14 +44,14 @@ local function init(panel)
     local system = Div{parent=panel,width=14,height=18,x=2,y=3}
 
     local init_ok = LED{parent=system,label="STATUS",colors=cpair(colors.green,colors.red)}
-    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=cpair(colors.green,colors.green_off)}
+    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=ind_grn}
     system.line_break()
 
     init_ok.register(databus.ps, "init_ok", init_ok.update)
     heartbeat.register(databus.ps, "heartbeat", heartbeat.update)
 
     local reactor = LEDPair{parent=system,label="REACTOR",off=colors.red,c1=colors.yellow,c2=colors.green}
-    local modem = LED{parent=system,label="MODEM",colors=cpair(colors.green,colors.green_off)}
+    local modem = LED{parent=system,label="MODEM",colors=ind_grn}
     local network = RGBLED{parent=system,label="NETWORK",colors={colors.green,colors.red,colors.orange,colors.yellow,colors.gray}}
     network.update(types.PANEL_LINK_STATE.DISCONNECTED)
     system.line_break()
@@ -57,11 +60,11 @@ local function init(panel)
     modem.register(databus.ps, "has_modem", modem.update)
     network.register(databus.ps, "link_state", network.update)
 
-    local rt_main = LED{parent=system,label="RT MAIN",colors=cpair(colors.green,colors.green_off)}
-    local rt_rps  = LED{parent=system,label="RT RPS",colors=cpair(colors.green,colors.green_off)}
-    local rt_cmtx = LED{parent=system,label="RT COMMS TX",colors=cpair(colors.green,colors.green_off)}
-    local rt_cmrx = LED{parent=system,label="RT COMMS RX",colors=cpair(colors.green,colors.green_off)}
-    local rt_sctl = LED{parent=system,label="RT SPCTL",colors=cpair(colors.green,colors.green_off)}
+    local rt_main = LED{parent=system,label="RT MAIN",colors=ind_grn}
+    local rt_rps  = LED{parent=system,label="RT RPS",colors=ind_grn}
+    local rt_cmtx = LED{parent=system,label="RT COMMS TX",colors=ind_grn}
+    local rt_cmrx = LED{parent=system,label="RT COMMS RX",colors=ind_grn}
+    local rt_sctl = LED{parent=system,label="RT SPCTL",colors=ind_grn}
     system.line_break()
 
     rt_main.register(databus.ps, "routine__main", rt_main.update)
@@ -80,7 +83,7 @@ local function init(panel)
 
     local status = Div{parent=panel,width=19,height=18,x=17,y=3}
 
-    local active = LED{parent=status,x=2,width=12,label="RCT ACTIVE",colors=cpair(colors.green,colors.green_off)}
+    local active = LED{parent=status,x=2,width=12,label="RCT ACTIVE",colors=ind_grn}
 
     -- only show emergency coolant LED if emergency coolant is configured for this device
     if type(config.EMERGENCY_COOL) == "table" then
@@ -90,7 +93,7 @@ local function init(panel)
 
     local status_trip_rct = Rectangle{parent=status,width=20,height=3,x=1,border=border(1,colors.lightGray,true),even_inner=true,fg_bg=cpair(colors.black,colors.ivory)}
     local status_trip = Div{parent=status_trip_rct,width=18,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
-    local scram = LED{parent=status_trip,width=10,label="RPS TRIP",colors=cpair(colors.red,colors.red_off),flash=true,period=flasher.PERIOD.BLINK_250_MS}
+    local scram = LED{parent=status_trip,width=10,label="RPS TRIP",colors=ind_red,flash=true,period=flasher.PERIOD.BLINK_250_MS}
 
     local controls_rct = Rectangle{parent=status,width=17,height=3,x=1,border=border(1,colors.white,true),even_inner=true,fg_bg=cpair(colors.black,colors.ivory)}
     local controls = Div{parent=controls_rct,width=15,height=1,fg_bg=cpair(colors.black,colors.white)}
@@ -116,20 +119,20 @@ local function init(panel)
     --
 
     local rps = Rectangle{parent=panel,width=16,height=16,x=36,y=3,border=border(1,colors.lightGray),thin=true,fg_bg=cpair(colors.black,colors.lightGray)}
-    local rps_man  = LED{parent=rps,label="MANUAL",colors=cpair(colors.red,colors.red_off)}
-    local rps_auto = LED{parent=rps,label="AUTOMATIC",colors=cpair(colors.red,colors.red_off)}
-    local rps_tmo  = LED{parent=rps,label="TIMEOUT",colors=cpair(colors.red,colors.red_off)}
-    local rps_flt  = LED{parent=rps,label="PLC FAULT",colors=cpair(colors.red,colors.red_off)}
-    local rps_fail = LED{parent=rps,label="RCT FAULT",colors=cpair(colors.red,colors.red_off)}
+    local rps_man  = LED{parent=rps,label="MANUAL",colors=ind_red}
+    local rps_auto = LED{parent=rps,label="AUTOMATIC",colors=ind_red}
+    local rps_tmo  = LED{parent=rps,label="TIMEOUT",colors=ind_red}
+    local rps_flt  = LED{parent=rps,label="PLC FAULT",colors=ind_red}
+    local rps_fail = LED{parent=rps,label="RCT FAULT",colors=ind_red}
     rps.line_break()
-    local rps_dmg  = LED{parent=rps,label="HI DAMAGE",colors=cpair(colors.red,colors.red_off)}
-    local rps_tmp  = LED{parent=rps,label="HI TEMP",colors=cpair(colors.red,colors.red_off)}
+    local rps_dmg  = LED{parent=rps,label="HI DAMAGE",colors=ind_red}
+    local rps_tmp  = LED{parent=rps,label="HI TEMP",colors=ind_red}
     rps.line_break()
-    local rps_nof  = LED{parent=rps,label="LO FUEL",colors=cpair(colors.red,colors.red_off)}
-    local rps_wst  = LED{parent=rps,label="HI WASTE",colors=cpair(colors.red,colors.red_off)}
+    local rps_nof  = LED{parent=rps,label="LO FUEL",colors=ind_red}
+    local rps_wst  = LED{parent=rps,label="HI WASTE",colors=ind_red}
     rps.line_break()
-    local rps_ccl  = LED{parent=rps,label="LO CCOOLANT",colors=cpair(colors.red,colors.red_off)}
-    local rps_hcl  = LED{parent=rps,label="HI HCOOLANT",colors=cpair(colors.red,colors.red_off)}
+    local rps_ccl  = LED{parent=rps,label="LO CCOOLANT",colors=ind_red}
+    local rps_hcl  = LED{parent=rps,label="HI HCOOLANT",colors=ind_red}
 
     rps_man.register(databus.ps, "rps_manual", rps_man.update)
     rps_auto.register(databus.ps, "rps_automatic", rps_auto.update)
diff --git a/reactor-plc/panel/style.lua b/reactor-plc/panel/style.lua
index edf3f64..1cf783c 100644
--- a/reactor-plc/panel/style.lua
+++ b/reactor-plc/panel/style.lua
@@ -39,4 +39,9 @@ style.colors = {
     { c = colors.brown,     hex = 0x672223 }    -- RED OFF
 }
 
+-- COMMON COLOR PAIRS --
+
+style.ind_grn = cpair(colors.green, colors.green_off)
+style.ind_red = cpair(colors.red, colors.red_off)
+
 return style
diff --git a/rtu/panel/front_panel.lua b/rtu/panel/front_panel.lua
index ad6f7a0..1bf2f51 100644
--- a/rtu/panel/front_panel.lua
+++ b/rtu/panel/front_panel.lua
@@ -22,8 +22,11 @@ local TEXT_ALIGN = core.TEXT_ALIGN
 
 local cpair = core.cpair
 
-local UNIT_TYPE_LABELS = { "UNKNOWN", "REDSTONE", "BOILER", "TURBINE", "DYNAMIC TANK", "IND MATRIX", "SPS", "SNA", "ENV DETECTOR" }
+local fp_label = style.fp_label
 
+local ind_grn = style.ind_grn
+
+local UNIT_TYPE_LABELS = { "UNKNOWN", "REDSTONE", "BOILER", "TURBINE", "DYNAMIC TANK", "IND MATRIX", "SPS", "SNA", "ENV DETECTOR" }
 
 -- create new front panel view
 ---@param panel graphics_element main displaybox
@@ -38,13 +41,13 @@ local function init(panel, units)
     local system = Div{parent=panel,width=14,height=18,x=2,y=3}
 
     local on = LED{parent=system,label="STATUS",colors=cpair(colors.green,colors.red)}
-    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=cpair(colors.green,colors.green_off)}
+    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=ind_grn}
     on.update(true)
     system.line_break()
 
     heartbeat.register(databus.ps, "heartbeat", heartbeat.update)
 
-    local modem = LED{parent=system,label="MODEM",colors=cpair(colors.green,colors.green_off)}
+    local modem = LED{parent=system,label="MODEM",colors=ind_grn}
     local network = RGBLED{parent=system,label="NETWORK",colors={colors.green,colors.red,colors.orange,colors.yellow,colors.gray}}
     network.update(types.PANEL_LINK_STATE.DISCONNECTED)
     system.line_break()
@@ -52,8 +55,8 @@ local function init(panel, units)
     modem.register(databus.ps, "has_modem", modem.update)
     network.register(databus.ps, "link_state", network.update)
 
-    local rt_main = LED{parent=system,label="RT MAIN",colors=cpair(colors.green,colors.green_off)}
-    local rt_comm = LED{parent=system,label="RT COMMS",colors=cpair(colors.green,colors.green_off)}
+    local rt_main = LED{parent=system,label="RT MAIN",colors=ind_grn}
+    local rt_comm = LED{parent=system,label="RT COMMS",colors=ind_grn}
     system.line_break()
 
     rt_main.register(databus.ps, "routine__main", rt_main.update)
@@ -61,7 +64,7 @@ local function init(panel, units)
 
 ---@diagnostic disable-next-line: undefined-field
     local comp_id = util.sprintf("(%d)", os.getComputerID())
-    TextBox{parent=system,x=9,y=4,width=6,height=1,text=comp_id,fg_bg=cpair(colors.lightGray,colors.ivory)}
+    TextBox{parent=system,x=9,y=4,width=6,height=1,text=comp_id,fg_bg=fp_label}
 
     TextBox{parent=system,x=1,y=14,text="SPEAKERS",height=1,width=8,fg_bg=style.label}
     local speaker_count = DataIndicator{parent=system,x=10,y=14,label="",format="%3d",value=0,width=3,fg_bg=cpair(colors.gray,colors.white)}
@@ -71,7 +74,7 @@ local function init(panel, units)
     -- about label
     --
 
-    local about   = Div{parent=panel,width=15,height=3,x=1,y=18,fg_bg=cpair(colors.lightGray,colors.ivory)}
+    local about   = Div{parent=panel,width=15,height=3,x=1,y=18,fg_bg=fp_label}
     local fw_v    = TextBox{parent=about,x=1,y=1,text="FW: v00.00.00",alignment=TEXT_ALIGN.LEFT,height=1}
     local comms_v = TextBox{parent=about,x=1,y=2,text="NT: v00.00.00",alignment=TEXT_ALIGN.LEFT,height=1}
 
@@ -90,7 +93,7 @@ local function init(panel, units)
     -- show routine statuses
     for i = 1, list_length do
         TextBox{parent=threads,x=1,y=i,text=util.sprintf("%02d",i),height=1}
-        local rt_unit = LED{parent=threads,x=4,y=i,label="RT",colors=cpair(colors.green,colors.green_off)}
+        local rt_unit = LED{parent=threads,x=4,y=i,label="RT",colors=ind_grn}
         rt_unit.register(databus.ps, "routine__unit_" .. i, rt_unit.update)
     end
 
@@ -115,7 +118,7 @@ local function init(panel, units)
 
         -- assignment (unit # or facility)
         local for_unit = util.trinary(unit.reactor == 0, "\x1a FACIL ", "\x1a UNIT " .. unit.reactor)
-        TextBox{parent=unit_hw_statuses,y=i,x=19,text=for_unit,height=1,fg_bg=cpair(colors.lightGray,colors.ivory)}
+        TextBox{parent=unit_hw_statuses,y=i,x=19,text=for_unit,height=1,fg_bg=fp_label}
     end
 end
 
diff --git a/rtu/panel/style.lua b/rtu/panel/style.lua
index edf3f64..bfc52cf 100644
--- a/rtu/panel/style.lua
+++ b/rtu/panel/style.lua
@@ -39,4 +39,10 @@ style.colors = {
     { c = colors.brown,     hex = 0x672223 }    -- RED OFF
 }
 
+-- COMMON COLOR PAIRS --
+
+style.fp_label = cpair(colors.lightGray, colors.ivory)
+
+style.ind_grn = cpair(colors.green, colors.green_off)
+
 return style
diff --git a/supervisor/panel/components/pdg_entry.lua b/supervisor/panel/components/pdg_entry.lua
index 1e49fca..3c6ec43 100644
--- a/supervisor/panel/components/pdg_entry.lua
+++ b/supervisor/panel/components/pdg_entry.lua
@@ -4,6 +4,8 @@
 
 local databus       = require("supervisor.databus")
 
+local style         = require("supervisor.panel.style")
+
 local core          = require("graphics.core")
 
 local Div           = require("graphics.elements.div")
@@ -15,28 +17,31 @@ local TEXT_ALIGN = core.TEXT_ALIGN
 
 local cpair = core.cpair
 
+local black_lg = style.black_lg
+local lg_white = style.lg_white
+
 -- create a pocket diagnostics list entry
 ---@param parent graphics_element parent
 ---@param id integer PDG session ID
 local function init(parent, id)
     -- root div
     local root = Div{parent=parent,x=2,y=2,height=4,width=parent.get_width()-2,hidden=true}
-    local entry = Div{parent=root,x=2,y=1,height=3,fg_bg=cpair(colors.black,colors.white)}
+    local entry = Div{parent=root,x=2,y=1,height=3,fg_bg=style.bw_fg_bg}
 
     local ps_prefix = "pdg_" .. id .. "_"
 
-    TextBox{parent=entry,x=1,y=1,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
-    local pdg_addr = TextBox{parent=entry,x=1,y=2,text="@ C ??",alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray),nav_active=cpair(colors.gray,colors.black)}
-    TextBox{parent=entry,x=1,y=3,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
+    TextBox{parent=entry,x=1,y=1,text="",width=8,height=1,fg_bg=black_lg}
+    local pdg_addr = TextBox{parent=entry,x=1,y=2,text="@ C ??",alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=black_lg,nav_active=cpair(colors.gray,colors.black)}
+    TextBox{parent=entry,x=1,y=3,text="",width=8,height=1,fg_bg=black_lg}
     pdg_addr.register(databus.ps, ps_prefix .. "addr", pdg_addr.set_value)
 
     TextBox{parent=entry,x=10,y=2,text="FW:",width=3,height=1}
-    local pdg_fw_v = TextBox{parent=entry,x=14,y=2,text=" ------- ",width=20,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local pdg_fw_v = TextBox{parent=entry,x=14,y=2,text=" ------- ",width=20,height=1,fg_bg=lg_white}
     pdg_fw_v.register(databus.ps, ps_prefix .. "fw", pdg_fw_v.set_value)
 
     TextBox{parent=entry,x=35,y=2,text="RTT:",width=4,height=1}
-    local pdg_rtt = DataIndicator{parent=entry,x=40,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=cpair(colors.lightGray,colors.white)}
-    TextBox{parent=entry,x=46,y=2,text="ms",width=4,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local pdg_rtt = DataIndicator{parent=entry,x=40,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=lg_white}
+    TextBox{parent=entry,x=46,y=2,text="ms",width=4,height=1,fg_bg=lg_white}
     pdg_rtt.register(databus.ps, ps_prefix .. "rtt", pdg_rtt.update)
     pdg_rtt.register(databus.ps, ps_prefix .. "rtt_color", pdg_rtt.recolor)
 
diff --git a/supervisor/panel/components/rtu_entry.lua b/supervisor/panel/components/rtu_entry.lua
index d9634e9..b6c1324 100644
--- a/supervisor/panel/components/rtu_entry.lua
+++ b/supervisor/panel/components/rtu_entry.lua
@@ -4,6 +4,8 @@
 
 local databus       = require("supervisor.databus")
 
+local style         = require("supervisor.panel.style")
+
 local core          = require("graphics.core")
 
 local Div           = require("graphics.elements.div")
@@ -15,32 +17,35 @@ local TEXT_ALIGN = core.TEXT_ALIGN
 
 local cpair = core.cpair
 
+local black_lg = style.black_lg
+local lg_white = style.lg_white
+
 -- create an RTU list entry
 ---@param parent graphics_element parent
 ---@param id integer RTU session ID
 local function init(parent, id)
     -- root div
     local root = Div{parent=parent,x=2,y=2,height=4,width=parent.get_width()-2,hidden=true}
-    local entry = Div{parent=root,x=2,y=1,height=3,fg_bg=cpair(colors.black,colors.white)}
+    local entry = Div{parent=root,x=2,y=1,height=3,fg_bg=style.bw_fg_bg}
 
     local ps_prefix = "rtu_" .. id .. "_"
 
-    TextBox{parent=entry,x=1,y=1,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
-    local rtu_addr = TextBox{parent=entry,x=1,y=2,text="@ C ??",alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray),nav_active=cpair(colors.gray,colors.black)}
-    TextBox{parent=entry,x=1,y=3,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
+    TextBox{parent=entry,x=1,y=1,text="",width=8,height=1,fg_bg=black_lg}
+    local rtu_addr = TextBox{parent=entry,x=1,y=2,text="@ C ??",alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=black_lg,nav_active=cpair(colors.gray,colors.black)}
+    TextBox{parent=entry,x=1,y=3,text="",width=8,height=1,fg_bg=black_lg}
     rtu_addr.register(databus.ps, ps_prefix .. "addr", rtu_addr.set_value)
 
     TextBox{parent=entry,x=10,y=2,text="UNITS:",width=7,height=1}
-    local unit_count = DataIndicator{parent=entry,x=17,y=2,label="",unit="",format="%2d",value=0,width=2,fg_bg=cpair(colors.gray,colors.white)}
+    local unit_count = DataIndicator{parent=entry,x=17,y=2,label="",unit="",format="%2d",value=0,width=2,fg_bg=style.gray_white}
     unit_count.register(databus.ps, ps_prefix .. "units", unit_count.set_value)
 
     TextBox{parent=entry,x=21,y=2,text="FW:",width=3,height=1}
-    local rtu_fw_v = TextBox{parent=entry,x=25,y=2,text=" ------- ",width=9,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local rtu_fw_v = TextBox{parent=entry,x=25,y=2,text=" ------- ",width=9,height=1,fg_bg=lg_white}
     rtu_fw_v.register(databus.ps, ps_prefix .. "fw", rtu_fw_v.set_value)
 
     TextBox{parent=entry,x=36,y=2,text="RTT:",width=4,height=1}
-    local rtu_rtt = DataIndicator{parent=entry,x=40,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=cpair(colors.lightGray,colors.white)}
-    TextBox{parent=entry,x=46,y=2,text="ms",width=4,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local rtu_rtt = DataIndicator{parent=entry,x=40,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=lg_white}
+    TextBox{parent=entry,x=46,y=2,text="ms",width=4,height=1,fg_bg=lg_white}
     rtu_rtt.register(databus.ps, ps_prefix .. "rtt", rtu_rtt.update)
     rtu_rtt.register(databus.ps, ps_prefix .. "rtt_color", rtu_rtt.recolor)
 
diff --git a/supervisor/panel/front_panel.lua b/supervisor/panel/front_panel.lua
index 4ae6ddd..3655dc4 100644
--- a/supervisor/panel/front_panel.lua
+++ b/supervisor/panel/front_panel.lua
@@ -29,6 +29,14 @@ local TEXT_ALIGN = core.TEXT_ALIGN
 
 local cpair = core.cpair
 
+local bw_fg_bg = style.bw_fg_bg
+
+local black_lg = style.black_lg
+local lg_white = style.lg_white
+local gry_wht = style.gray_white
+
+local ind_grn = style.ind_grn
+
 -- create new front panel view
 ---@param panel graphics_element main displaybox
 local function init(panel)
@@ -45,26 +53,26 @@ local function init(panel)
     local system = Div{parent=main_page,width=14,height=17,x=2,y=2}
 
     local on = LED{parent=system,label="STATUS",colors=cpair(colors.green,colors.red)}
-    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=cpair(colors.green,colors.green_off)}
+    local heartbeat = LED{parent=system,label="HEARTBEAT",colors=ind_grn}
     on.update(true)
     system.line_break()
 
     heartbeat.register(databus.ps, "heartbeat", heartbeat.update)
 
-    local modem = LED{parent=system,label="MODEM",colors=cpair(colors.green,colors.green_off)}
+    local modem = LED{parent=system,label="MODEM",colors=ind_grn}
     system.line_break()
 
     modem.register(databus.ps, "has_modem", modem.update)
 
 ---@diagnostic disable-next-line: undefined-field
     local comp_id = util.sprintf("(%d)", os.getComputerID())
-    TextBox{parent=system,x=9,y=4,width=6,height=1,text=comp_id,fg_bg=cpair(colors.lightGray,colors.ivory)}
+    TextBox{parent=system,x=9,y=4,width=6,height=1,text=comp_id,fg_bg=style.fp_label}
 
     --
     -- about footer
     --
 
-    local about   = Div{parent=main_page,width=15,height=3,x=1,y=16,fg_bg=cpair(colors.lightGray,colors.ivory)}
+    local about   = Div{parent=main_page,width=15,height=3,x=1,y=16,fg_bg=style.fp_label}
     local fw_v    = TextBox{parent=about,x=1,y=1,text="FW: v00.00.00",alignment=TEXT_ALIGN.LEFT,height=1}
     local comms_v = TextBox{parent=about,x=1,y=2,text="NT: v00.00.00",alignment=TEXT_ALIGN.LEFT,height=1}
 
@@ -82,25 +90,25 @@ local function init(panel)
 
     for i = 1, config.NUM_REACTORS do
         local ps_prefix = "plc_" .. i .. "_"
-        local plc_entry = Div{parent=plc_list,height=3,fg_bg=cpair(colors.black,colors.white)}
+        local plc_entry = Div{parent=plc_list,height=3,fg_bg=bw_fg_bg}
 
-        TextBox{parent=plc_entry,x=1,y=1,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
-        TextBox{parent=plc_entry,x=1,y=2,text="UNIT "..i,alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
-        TextBox{parent=plc_entry,x=1,y=3,text="",width=8,height=1,fg_bg=cpair(colors.black,colors.lightGray)}
+        TextBox{parent=plc_entry,x=1,y=1,text="",width=8,height=1,fg_bg=black_lg}
+        TextBox{parent=plc_entry,x=1,y=2,text="UNIT "..i,alignment=TEXT_ALIGN.CENTER,width=8,height=1,fg_bg=black_lg}
+        TextBox{parent=plc_entry,x=1,y=3,text="",width=8,height=1,fg_bg=black_lg}
 
-        local conn = LED{parent=plc_entry,x=10,y=2,label="LINK",colors=cpair(colors.green,colors.green_off)}
+        local conn = LED{parent=plc_entry,x=10,y=2,label="LINK",colors=ind_grn}
         conn.register(databus.ps, ps_prefix .. "conn", conn.update)
 
-        local plc_addr = TextBox{parent=plc_entry,x=17,y=2,text=" --- ",width=5,height=1,fg_bg=cpair(colors.gray,colors.white)}
+        local plc_addr = TextBox{parent=plc_entry,x=17,y=2,text=" --- ",width=5,height=1,fg_bg=gry_wht}
         plc_addr.register(databus.ps, ps_prefix .. "addr", plc_addr.set_value)
 
         TextBox{parent=plc_entry,x=23,y=2,text="FW:",width=3,height=1}
-        local plc_fw_v = TextBox{parent=plc_entry,x=27,y=2,text=" ------- ",width=9,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+        local plc_fw_v = TextBox{parent=plc_entry,x=27,y=2,text=" ------- ",width=9,height=1,fg_bg=lg_white}
         plc_fw_v.register(databus.ps, ps_prefix .. "fw", plc_fw_v.set_value)
 
         TextBox{parent=plc_entry,x=37,y=2,text="RTT:",width=4,height=1}
-        local plc_rtt = DataIndicator{parent=plc_entry,x=42,y=2,label="",unit="",format="%4d",value=0,width=4,fg_bg=cpair(colors.lightGray,colors.white)}
-        TextBox{parent=plc_entry,x=47,y=2,text="ms",width=4,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+        local plc_rtt = DataIndicator{parent=plc_entry,x=42,y=2,label="",unit="",format="%4d",value=0,width=4,fg_bg=lg_white}
+        TextBox{parent=plc_entry,x=47,y=2,text="ms",width=4,height=1,fg_bg=lg_white}
         plc_rtt.register(databus.ps, ps_prefix .. "rtt", plc_rtt.update)
         plc_rtt.register(databus.ps, ps_prefix .. "rtt_color", plc_rtt.recolor)
 
@@ -116,22 +124,22 @@ local function init(panel)
     -- coordinator page
 
     local crd_page = Div{parent=page_div,x=1,y=1,hidden=true}
-    local crd_box = Div{parent=crd_page,x=2,y=2,width=49,height=4,fg_bg=cpair(colors.black,colors.white)}
+    local crd_box = Div{parent=crd_page,x=2,y=2,width=49,height=4,fg_bg=bw_fg_bg}
 
-    local crd_conn = LED{parent=crd_box,x=2,y=2,label="CONNECTION",colors=cpair(colors.green,colors.green_off)}
+    local crd_conn = LED{parent=crd_box,x=2,y=2,label="CONNECTION",colors=ind_grn}
     crd_conn.register(databus.ps, "crd_conn", crd_conn.update)
 
-    TextBox{parent=crd_box,x=4,y=3,text="COMPUTER",width=8,height=1,fg_bg=cpair(colors.gray,colors.white)}
-    local crd_addr = TextBox{parent=crd_box,x=13,y=3,text="---",width=5,height=1,fg_bg=cpair(colors.gray,colors.white)}
+    TextBox{parent=crd_box,x=4,y=3,text="COMPUTER",width=8,height=1,fg_bg=gry_wht}
+    local crd_addr = TextBox{parent=crd_box,x=13,y=3,text="---",width=5,height=1,fg_bg=gry_wht}
     crd_addr.register(databus.ps, "crd_addr", crd_addr.set_value)
 
     TextBox{parent=crd_box,x=22,y=2,text="FW:",width=3,height=1}
-    local crd_fw_v = TextBox{parent=crd_box,x=26,y=2,text=" ------- ",width=9,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local crd_fw_v = TextBox{parent=crd_box,x=26,y=2,text=" ------- ",width=9,height=1,fg_bg=lg_white}
     crd_fw_v.register(databus.ps, "crd_fw", crd_fw_v.set_value)
 
     TextBox{parent=crd_box,x=36,y=2,text="RTT:",width=4,height=1}
-    local crd_rtt = DataIndicator{parent=crd_box,x=41,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=cpair(colors.lightGray,colors.white)}
-    TextBox{parent=crd_box,x=47,y=2,text="ms",width=4,height=1,fg_bg=cpair(colors.lightGray,colors.white)}
+    local crd_rtt = DataIndicator{parent=crd_box,x=41,y=2,label="",unit="",format="%5d",value=0,width=5,fg_bg=lg_white}
+    TextBox{parent=crd_box,x=47,y=2,text="ms",width=4,height=1,fg_bg=lg_white}
     crd_rtt.register(databus.ps, "crd_rtt", crd_rtt.update)
     crd_rtt.register(databus.ps, "crd_rtt_color", crd_rtt.recolor)
 
@@ -155,7 +163,7 @@ local function init(panel)
         { name = "PKT", color = cpair(colors.black, colors.ivory) },
     }
 
-    TabBar{parent=panel,y=2,tabs=tabs,min_width=9,callback=page_pane.set_value,fg_bg=cpair(colors.black,colors.white)}
+    TabBar{parent=panel,y=2,tabs=tabs,min_width=9,callback=page_pane.set_value,fg_bg=bw_fg_bg}
 
     -- link RTU/PDG list management to PGI
     pgi.link_elements(rtu_list, rtu_entry, pdg_list, pdg_entry)
diff --git a/supervisor/panel/style.lua b/supervisor/panel/style.lua
index 0668ccc..49bfb4f 100644
--- a/supervisor/panel/style.lua
+++ b/supervisor/panel/style.lua
@@ -39,4 +39,16 @@ style.colors = {
     { c = colors.brown,     hex = 0x672223 }    -- RED OFF
 }
 
+-- COMMON COLOR PAIRS --
+
+style.text_fg_bg = cpair(colors.black, colors.ivory)
+style.bw_fg_bg = cpair(colors.black, colors.white)
+style.fp_label = cpair(colors.lightGray, colors.ivory)
+
+style.black_lg = cpair(colors.black, colors.lightGray)
+style.lg_white = cpair(colors.lightGray, colors.white)
+style.gray_white = cpair(colors.gray, colors.white)
+
+style.ind_grn = cpair(colors.green, colors.green_off)
+
 return style