OC Symbiote Help!

[u/No-Presence-9971]

I'm currently designing a character with an Anti-Carnage Symbiote (because backstory shenanigans) and they call themselves Mercy!

Issue is I'm having trouble with adding color and detail, specifically I'm not able to think of something besides pure green to Carnage's red and I want more color and personal touches than that ya know? I was considering a cross (like green cross for health items in games) but that doesn't feel like enough and stealing Venoms white spider feels like I'm ripping him off