Natural dyes are derived from substances found in nature. Some examples of natural dyes are:
Indigo: A blue dye obtained from a variety of plants; but mostly from those in the genus indigofera, which are native to the tropics.
Cochineal: A red dye prepared from a dried tropical insect that feeds on cacti.
Orcein: A purple dye prepared from a certain colorless lichen. Lichen are organisms that grow on rocks, tree branches, or bare ground and are composed of a green alga and a colorless fungus.
Brazilin: Stains red and is derived from the bark of a Brazilwood tree which is a species native to Central America.
Hematoxylin: Is derived from Haematoxylon campecianum, a forest tree from Central America also know as the logwood tree. Haematoxylon literally means "blood wood" and it refers to the color of the heartwood.