I wanna say that I recall a rather well-known Spore mod (Platinum Spore, if I'm not mistaken?) actually did something very similar to this idea. I believe running Spore with said mod installed, it changed the "Knight" Archetype into an unofficial archetype named simply called "Grox" where the Archetype's card color matched that dark purple-ish color of the Grox Empire.
Naturally, however, this was rather silly since one of the possible trait combinations for obtaining this "Grox" archetype could be Carnivore, Predator, Friendly
, and Economic
, and obviously the two latter qualities in bold do not match the Grox's personality at all.