I have gotten tickets in green, gold, maroon, white, and (3) blue cars, that I can remember. I had a habit of paying a small fee every few years to arrive places a little earlier than others.
I have only owned two white cars, the biggest bogus speeding ticket was from a state cop. I was in a white 73 Dodge Dart. In a white Mercedes 400E, I just got a lecture for using the throttle in a middle of an intersection to "rotate" the car without having to turn the steering quite as far.
Haven't been stopped (yet) in my red Mustang. I think color is kind of irrelevant.