Tried searching a list in the forums for every subfactions' colors but have came up empty handed. I know I could probably check in game however there's the issue with the game's lighting changing what the actual color looks like. Is there list somewhere...?

Somewhat relatedly, the plugin "Dynamic HUD Colours" (aka FlamboyanceHUD) included an option to automatically change the color of your HUD depending on whose faction space you are flying in.

I had all sorts of lua errors with FlamboyanceHUD after the devs pushed an update this year.

First number is palette color. Last three numbers are RGB.

Unaligned: 239, 105 0 29
Itani: 144, 3 154 200
Serco: 96, 250 97 84
UIT: 100, 254 177 25
TPG: 105, 118 197 61
BioCom: 148, 1 91 161
Valent: 99, 254 141 26
Orion: 14, 194 195 194
Axia: 151, 96 50 148
Corvus: 255, 20 21 20
Tunguska: 44, 105 198 162
Aeolus: 186, 143 8 106
Ineubis: 161, 170 36 19
Xang Xi: 173, 5 118 92

From console:
/lua for k=0,13 do print(FactionName[k]..": "..FactionColor[k]..", "..ShipPalette_string[FactionColor[k]]) end

Thanks man!

I tried flamboyant hud. Unfortunately as soon as I entered a command the whole screen turned matte turquoise! D:

Oh noes! My plugin is broken?!?! Why didn't anyone tell me! Pesky devs you ruin everything.