Make mob enemies have more distinct color schemes to better identify them aside from the planned being more detailed or different. when fending off swarms of them they just look the same until a boss/mid boss appears. so by adding color identifications you give more focus on certain enemy swarms to defeat thats disadvantagious to some of your builds in the long run making you play a little bit more tactical
dark purple common enemies.
less dark purple with more on either RBG colors for rare enemy and element types.
darker purple with glow of RGB for special types.
and For boss types a more agressive RBG glow.
this color coding suggestion is base on how media identifies aliens enemy types ( Arachnids, Betas, Kaijus and more)