Well least you not like me - I colour whole piece up to finest details, fancy and good themes - if I may say so myself...
Then will use LUT that makes it all black and white and share image black and white.
I don’t see anything wrong with your OC sharing a color palette with an already established character. Heck, remembering the game Skullgirls, every character alt is a direct reference to a character of another franchise: like one of Big Band’s alts resembling King Dedede.