Black the COLOR as in your crayon or oil pastel is all colors. Black as in DARKNESS is the abscence of light.
In the visible spectrim of light, all the different colors of light you can see combine to make white light. When a white light is shined on a "white" object, all the colors are reflected back to your eyes and you see it as white. Shine a white light on a "black" object, and all the colors in white light are absorbed, thus no light is reflected back and you see something as black. The only way you can see an individual color of the light spectrim is to have an object that absorbs all colors but one. So a black object is not really devoid of light, but absorbing it so your eye cannot detect any light coming from that object.
Thank you Noriaki, they were starting to scare me.