One thing I have seen that looked just great for someone stuck in the middle is two tone, but the colors being very close. An idea I have had was black and a really dark burgundy. Or say a really dark blue along with black. Something like that. When you first come up on it, you think it's a solid color, then you look at it some more and it's "is that two tone". I guess you call it a "ghost" effect, like ghost flames.