Not prezakly. The white reflects more of all wavelengths. Every color turns into heat when absorbed, but not when reflected. As for the pano roof, cutting down all wavelengths is the real key. The eye has a huge range of adjustment, and even a few percent of full sun looks bright enough.One interesting thing we noticed, there were four seats with the four different signature leather colors sitting out in the sun. All of them were quite hot, except for the white, which was merely warm.
So if you're concerned about black being hot, and thinking of tan instead, don't bother. It makes no difference. Only the white seat was cooler.
(This isn't that unexpected; it's well known that IR absorption matters more than visible color.)