Each chromatic color can be described in three ways. Hue is the attribute that permits colors to be classed as red, yellow, blue, and so on. The description of a hue can be more precise by identifying the color's actual inclination from one hue to the next. For instance, a particular red may be more accurately called orange-red. Different color systems use different codes to describe colors made up of letters, numbers, or a combination of the two.
Value refers to the degree of lightness or darkness in any color.
A color of known hue can be more Accurately described by calling it either light or dark. For instance, a red is said to be light red if it is lighter than our notion of a standard red. Chroma indicates the intensity or purity of a color. Colors with strong chroma are the most brilliant, most vivid colors that can be obtained. Principles of Color Design.