Color is produced by physical chara

Color is produced by
physical characteristics
chemical aspects

Color perception, in turn, is a complex process involving such physical phenomena as transmission, refraction, absorption, and scattering, among others. The initial stages of color perception are physical, but the later stages involve chemical signals that are transformed into neural responses that will be interpreted by the brain as color.

Three elements are conjoined: light, object, and observer.

Thus, color evaluation (economic importance)
Tristimulus

most living matter lacks color; only a small proportion of living matter is responsible for the beautiful gamut of colors commonly observed simply by looking around us.