I don't think color matters, it seems to have more to do with type and condition of the car. Of the cars that I see pulled over around here 90% are a little beat or funky in some way. I think that the cops are using the speeding as an opportunity to pull over a suspicious looking vehicle to check for other things.
I've been pulled over 3 times in the past 6 years in my signal red 911 ... driving substantially over the limit every time and let go with a warning all three times. I'm polite, admit that I was speeding and apologize. Knock on wood, it's worked so far. I
have gotten 3 tickets in my dark green ute and my wife's silver Volvo wagon in this same time period.