India: Globex – organic pigments

Abstract

Color blindness, the inability to discriminate certain colors visually, is common in male humans where it prevents the discrimination between reds, yellows, and greens. Other forms of color blindness in humans are far less common. Among most new world primates, trichromacy is limited to females, with males almost universally red–green color blind. Color blindness is also present in many nocturnal and marine mammals where only a single class of cone photoreceptor is present.