any material used for its color

a unique copper uroporphyrin pigment responsible for the bright green coloration of several birds of the family Musophagidae, most notably the turaco.

a flavonol found in many fruits, vegetables, leaves and grains.

a naturally occurring red pigment, found only in the bird family Musophagidae, the turacos.

a compound extracted from the heartwood of the logwood tree.

a green tetrapyrrolic bile pigment, a product of heme catabolism.