On the color spectrum, white is the absence of all color, black is the result of all color. The reason the black interior of your car gets very hot in the sun is that it absorbs the whole spectrum.
Objects absorb every wavelength of light within the visible spectrum except for the color of which it is, and that wavelength is reflected. Black objects absorb almost all the light incident upon it,...
Any material ... cloth, paint, stone, liquid, soil, wood ... that absorbs all wavelengths of visible light APPEARS BLACK,
because none of the visible light that hits it bounces away into your eye...
Light itself is made up of all the colors, and so an object that appears black will absorb all the colors, while white will reflect all the colors. This is also why white cars left in the sun are...