Human Body Skin Color is Determined by a Pigment Called Melanin. World’s Every People has melanin in our skin (both fair and dark-skinned people), Melanin is of two types. The two forms of melanin are called eumelanin and pheomelanin. Eumelanin mainly comes in shades of brown and black, while pheomelanin appears as a red and yellow color. Melanin Produced by a Specialized group of cells it’s called melanocytes.
How is Skin Colours are Different
Our skin color depends on the production of melanin. Causes more melanin to darken and a lesser extent Cause white. The melanin is more produce in sunlight because in the presence of sunlight melanocyte cell makes more melanin. So high sunlight country’s people have Dark skin and low sunlight countries peoples have a fair skin color. 
