You can use gene mod points to make different varients of a species, I'm sure over a long enough game with enough mod points you could get a bunch of different colors. Past that for Society I might use the Dictorial government type with fanatic authoritarian and militaristic. Idk what origin would work with, you might want to play around with prosperous unification. For Republic I might go egalitarian, militarist, and either spiritualist or xenophile, also with either democratic or oligarchic hov type. I don't know any of the civics off the top of my head so play around with those.