COMPLEMENTARY: Complementary Color scheme is any two Hues positioned exactly opposite each other on the Basic Color Wheel. Here, as an example of Red and its opposite Green. When you mix two opposites together anywhere on the Color Wheel, the result becomes increasingly neutral (see middle). There's an unlimited variety of color mixtures, tints, shades and tones that can be achieved using only these two colors plus white and black.
Complementary color scheme (one color is cool, other is warm) * Make one of your Complementary Colors the dominant one in your palette. * Use various intensities of that dominant color, add different proportions of complement, vary by adding white or black. * For contrasting accents, choose non-dominant color. Make sure it has a little of the dominant hue mixed in to tone it down a touch. Otherwise these accents will jump out to the eye a bit too much.
Split-Complementary color scheme The split-complementary color scheme is a variation of the complementary color scheme. In addition to the base color, it uses the two colors adjacent to its complement. This color scheme has the same strong visual contrast as the complementary color scheme, but has less tension. The split-complimentary color scheme is often a good choice for beginners, because it is difficult to mess up.
The colors of the RGB color model, which uses combinations of red, green, and blue light on a black screen to create all the colors seen on a computer display or television. Complementary colors are opposite each other.