Car color has little to nothing to do with the price.
Oddly enough, when we bought our last car, we were told that if we wanted it in burgundy, we had to get the luxury package, with leather heated seats, power everything, Bose stereo, etc etc. It turns out that we simply could not have the standard package in that color; it simply wasn't offered.
So, in that case (and yes, it's anecdotal), the car color was directly linked to the price. I wonder how many car manufacturers do that.
Incidentally, we went for dark grey. Mrs LMNO still dreams of heated seats, though.