Black and White
According to the website Color Matters . Black and white both are and are not colors. The reasoning goes as follows:
When it comes to light, black is not a color. Black is the absence of color when there is no light. When there is light a black object absorbs all colors of light rays, therefore reflecting none back to the eye.
When it comes to pigment, black is a color. It is the combination of the primary colors in the correct proportions.
Obviously, the inverse is true of white except in the case of white pigment, where a white substance is ground up to "create" white.
Now i know everything there is to know about black and white and have written it down - in black and white.