Natural shades of hair are all created by 2 types of melanin: eumelanin and pheomelanin.
The relative amount of each of these 2 types, the total amount of melanin, and the size of the granules in each hair together determine hair color.Where as eumelanin is the predominant pigment in dark or black hair, pheomelanin prevails inblond or red hair, and overall melanin content is lower