There's eumelanin, which gives rise to a range of brown skin tones, as well as black, brown, and blond hair, and pheomelanin, which causes the reddish browns of freckles and red hair.
la eumelanina, que da lugar a una gama de tonos de piel oscura así como al pelo negro, castaño y rubio, y la feomelanina, el pigmento rojo de las pecas y del cabello pelirrojo.