New Tattoo Idea. Help?

So, I want something similar to this between my two shoulder tattoos. Purple butterflies instead of blue, no star things and no black strip things on the butterflies. But I'm debating on keeping the "butterfly trail" thing blackish or changing it to a different color. Keep it or change it? I want to have some green in it, but not sure how I'm going to go about that. All suggestions are welcomed :-)