Oh you're so true
The Ancient Colors mod, that was it!
Otherwise I put my previous post a little unprecise...
Otherwise e.g. hoplites would look almost the same for every faction
By that I meant, if the mod goes 100% historical, it would be so.
In the current state I love the colors! Especially the AOR units which don't have any faction colors at all add a lot to immersion. Also because they have faction specific officers in their units, something only those who love details probably ever noticed 