The opposite of albinism is called..?

The term melanism refers to black pigment in the skin or its appendages. Most commonly, dark individuals become fitter to survive and reproduce in their environment as they are better camouflaged. Adaptive melanism has been shown to occur in a variety of animals, including mammals such as squirrels, many felines and canids, and coral snakes.Melanism, meaning a mutation that results in completely dark skin, does not exist in humans.