Hardly "melanin-challenged". Some South Asian Indians are blacker and darker than Africans. They have distinct aboriginal or African features.
"1. The Negritos-Perhaps they were the first of the racial groups that came to India. They got settled in the hilly areas of Kerala and the Andaman Islands. Kadar, Irula and Puliyan tribes of Kerala resemble to a great extent with the Negritos. They are related to Africa, Australia and their neighbouring islands. The Negritos have black (dark) skin, woolly hair, broad and flat nose and slightly protruded jaws."