Black cars heat up more. Black interiors compound the problem.
The color we see is the combination of the frequencies in the visual spectrum that are reflected rather than absorbed. Black means all of the energy in the visual spectum is absorbed. White means that it’s all reflected.
Realize that all “color” is is a combination of those frequencies in the electromagnetic spectrum that excite the cells in the retinas in our eyes. That range of frequencies is called the “visual spectrum”. If no frequencies in the visual spectrum are reflected back at our retinas, none of the cells are excited and we see “black”. If all the colors are reflected back at us, all out retinal cells are excited and we see “white”.
The more radiant energy (light is electomagnetic energy) is absorbed, the more the item heats up.
Black = electromagnetic energy in the visual spectrum all absorbed = heat
White = electromagnetic energy in te visual spectrum all reflected = less heat (other frequencies outside the visual spectrum are absorned, so heat will happen).
Some frequencies of electromagnetic anergy pass right through, such as radio waves.