Small stage gig? Unless you've got a board, lighting tech and enough lights to make it worthwhile (and then it's not really a small gig anymore), stick with white and soft white. If you've got limited access to a dimmer or somesuch, you might consider one or two (but don't go overboard) 'spotlights' with gels for heightened impact - like a dark blue over the lead spot for emotional solos and such.

But if it's a small gig, don't knock yourself out. Spend the money you'd spend on a lighting rig to make sure that your sound is good - rent a tech for the evening or something.

M