My dad does up bmx's everyday, and uses loads of different colour schemes but suprisingly out of the lot, the best looking bikes he has done, are often white! If you do the frame white, and then get really bright (flourescent if you can) accessories such as brakes, chain etc (forks can be bright too), it honestly does look great and also doesnt look overdone, like alot of peoples who choose really bright colours for them. My bmx looks great, its white, with flourescent pink, and im always getting comments on it =]
Hope I helped =]