In addition to a color being specified by its RGB components, it can also be represented by its hue, saturation, and brightness. The hue, saturation, and brightness are all aspects of the red, green, and blue color scheme. The hue is the specific tone of the color wheel made up of red, green, and blue tones. The saturation is the intensity of the hue from gray tone to a pure vivid tone. And the brightness is the lightness or darkness of a tone.