why does your hair get darker
Skin gets darker when exposed to sunlight because ultraviolet rays from the sun stimulate the production of melanin. Melanin is a pigment that protects the skin from damage. â¦ It is produced by melanocyte cells within the skin.   Hair also contains melanin, made by melanocytes beneath the scalp. However, the hair above the surface of your skin is already dead; its melanin cannot be renewed by the melanocytes.