Here are my custom civ colours palettes. Some palettes have one ( China : red ), two ( Greece : blue and white ) or even three colours ( France : Bleu Blanc Rouge of course ).

They are sorted as the civ are in the editor. I use ntp00 for barbarians, ntp01 for Romans, ntp02 for Egyptians,...

http://www.civfanatics.net/uploads8/couleurs_pvw.jpg

http://www.civfanatics.net/uploads8/Palettes_arsouye.zip

if you download it, make a back up of the standard ntp files !!!

I like them!

wasn't there something like this done before?

The original idea is from Rhye. You can find it there : http://forums.civfanatics.com/showthread.php?s=&threadid=85016

There are some other sets.

Very nice :D