What helps determine hair color?

Hair color is primarily determined by the type and amount of melanin produced by melanocytes in the hair follicles. There are two main types of melanin: eumelanin, which is responsible for black and brown shades, and pheomelanin, which produces yellow and red hues. Genetic factors play a significant role in determining how much and what type of melanin is produced, while environmental factors and aging can also influence hair color over time.