I see what you mean, maybe just leaving the minis unpainted is a viable option. But i mean, if you don’t paint the face MIDNIGHT BLACK and the lips RUBY RED you’re probably doing ok for the most part.
Edit/Addition: you’d probably run the risk more if it was a life size bust of Harrison Ford - minis are, well, mini, and you’re not likely to make it look like you’ve done a racist Han Solo monstrosity .

On the other hand, my barbarian ended up like a Conan wannabe with a cheap bronze-hilted sword (I love bronze colour) so I must admit my original ideas ended showing on the elf only…