It often gets a lot more intricate in the composition of those uniforms, like Infantry had white trim, artillery wore blue trim, whatever. but the general basis was things like "Russians wear green, French wear white, later blue. British wear red. etc"
I've made -something- of that sort for several BW factions, I added all of the Superpowers, and every major power or active I could think of plus a few just put in there to fill the gaps.
This would be seen as something like an idiot's guide to the galaxy... If you see a minifig wearing armor in this pattern, they're proooobably from this faction. But not always.
For the most part I've kept it to the most basic pattern available. usually for grunt infantry.
As this goes along, What I might start doing for some of the factions, is if they have -enough- of them, I can add alternates too. Right now the only one that has alternates is the USSSR, because Zipp's differs from Duerer's. and I also have my own too *I added pretty much all of my current factions spare for 1 or 2 shitty unfinished ones*
Also, I apologize if the Demonym for your empire is incorrect.
If you'd like another added, just tell me what you need. I'll add them once I have enough to fill a full row.
* Magikstrate, Poland and Galacia are considered the "primary factions" of the Magenta, Purple and Gold Sectors respectively. These sectors are known to have multiple factions within them, big and small
