and able to analyze data at high speeds. Color scientists developed color (spectral) and gloss (geometric) scales founded on human color perception. They studied the response of an observer to light distributed b an object. The phenomenon of color results from this interac tion of light, object, and observer. The brain processes the light distributed by the object and reaching the eye. An object has no inherent color. and so it may be stated that color exists only in the mind of the viewer. A group of trained observers will differ in their judgment and description of a perceptible color differ ence. The sensation of color varies even for observers with normal color vision, not to men tion those without normal color vision. Ap proximately 8% of the male population and 0.5% of the female population are color-defec tive. Other factors can also influence the color experience. When identified, they lead to a method for color evaluation