Red, blond, chestnut or black; why different hair colors?
Hair color depends on a molecule called melanin. Melanin is a dark brown pigment. The more melanin, the darker the hair. Melanin is also responsible for the color of the skin and explains our tan in summer. It is made by cells that are found in the skin and in the eyes.
It is a chemical produced by our cells and responsible for the color of our hair, skin, and eyes.