Last night I saw a blues band called Storm Warning. Singer/harp player and guitarist wore brightly tie-die T-shirts with black leather waistcoats (useful as Terry said, for picks, slides and harps). The drummer had a pink shirt, the bass player a black T-shirt and suit jacket and the keyboard player wore a white grandad shirt under a black tailcoat (!) and a baseball cap. I'm not sure what image they were trying to project!
RtS
(in the audience we were mostly wearing black!)