Surface hues that do not reflect a single wavelength of light, but rather all of them at once. A color may be neutralized (reduced in intensity) by mixture with its complement or any of the neutrals: white, gray or black.
In the GDDM function, one of the colors selected to display graphics primitives; for example, white on a display or black on a printer. Contrast with background color.
Colors such as white, black, gray and tan, that easily blend with other colors.