What three factors are responsible for colration of skin?

The coloration of skin is primarily influenced by three factors: the amount and type of melanin produced by melanocytes, which provides pigmentation; the presence of carotene, a pigment found in certain foods that can affect skin tone; and the blood flow in the underlying blood vessels, which can alter skin color due to changes in oxygenation and temperature. Together, these factors contribute to the wide variety of human skin tones.