Pigmentation
The coloring of the skin, hair, mucous membranes, and retina of the eye.</P> Pigmentation is due to the deposition of melanin which is a coloring matter.
The melanin is produced by specialized cells called melanocytes.</P> Other pigmented terms include hyperpigmentation (too much pigment), hypopigmentation and underpigmentation (too little pigment), and depigmentation (loss of pigment).