This is the quality of a color independent of it’s saturation (colorfulness) or its brightness. Whereas Red and Burgundy are different colors, they are the same hue, being different only in brightness (Red being brighter than Burgundy). Similarly, Navy and Steel Blue are different colors, but the same hue, being different only in saturation. Black, white or gray has no hue—these are “neutral” and do not contain a color, only brightness.