the opposite of albinism called melanism, a recessive trait where the skin and fur are all black.
Melanism is an undue development of dark-colored pigment in the skin or its appendages and is the opposite of albinism. It is also the medical term for black jaundice.[2] The word ‘melanism’ is deduced from the Greek: μελανός, meaning black pigment.[3]
WRONG! Melanism is patchy. It’s photoshopped...