<P> Use of the phrase color scheme may also and commonly does refer to choice and use of colors used outside typical aesthetic media and context, although may still be used for purely aesthetic effect as well as for purely practical reasons . This most typically refers to color patterns and designs as seen on vehicles, particularly those used in the military when concerning color patterns and designs used for identification of friend or foe, identification of specific military units, or as camouflage . </P> <P> A color scheme in marketing is referred to as a trade dress and can sometimes be protected by trademark or trade dress laws, as is the pink color of Owens - Corning fiberglass . </P> <P> Color schemes are often described in terms of logical combinations of colors on a color wheel . Different types of schemes are used . </P> <P> Monochromatic colors are all the colors (tints, tones, and shades) of a single hue . Monochromatic color schemes are derived from a single base hue, and extended using its shades, tones and tints (that is, a hue modified by the addition of black, gray (black + white) and white . As a result, the energy is more subtle and peaceful due to a lack of contrast of hue . </P>

Two colors of light that add together to form black light are called complimentary colors