What car color has the highest temperature?

Answer 1

Flat black, but of course, that's literally impossible to have. Basically, it's the flattest color of black you can have (flat as in not shiny) that normally would produce the most heat.

Answer 2

Black cars tend to have the highest temperature as they absorb more sunlight and heat compared to lighter colored cars. White cars, on the other hand, reflect more sunlight and stay cooler.