black skin or intermediate shade … The different skin colors of humans are an
adaptation to the differences in intensity of ultraviolet rays according to
regions of the world. Ultraviolet radiation is stronger in Africa than in
Europe or North America, for example. So, it makes sense that people from
different countries have different skin types and colors. However modern man
moves around the world a lot, which has muddied the waters: from now on, people
of various ethnic origins are found in all latitudes.
The more melanin pigments, the
darker it is.
Conversely, the less melanin, the
lighter the skin becomes.
Darker skin provides better
protection against cell damage caused by intense sunlight.