What we notice most about light is color. The color of any object relates directly to the amount, and type, of light that it reflects or absorbs. If an object appears to be red, it's because the object absorbs all of the colors in the light spectrum with the exception of red, which is reflected back to our eyes. If an object absorbs all of the colors found in white light then it appears black. Conversly, if all of the colors are reflected an object appears white.
Color comes from the visible spectrum of light.
The colors that make up white light from longest to shortest wavelengths are red, orange, yellow, green, blue, indigo and violet. In any system of colors, those that cannot be mixed from any of the others are called primary colors. The primary colors of light are red, green and blue. From these three colors, every other color of light can be made. The color and intensity of light is absorbed and parsed in the human eye by the retina, which composes the inner lining.