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Hair color comes from two naturally occurring pigments, called melanins.
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They often contain attractive pigments, sometimes bright pink or yellow carotenoids, sometimes camouflaging brown-black melanins.
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Melanocyte activity, along with the type and distribution of melanins, is the main driver for diversity of skin pigmentation.
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Melanins obtained from tumours form black, shiny masses; they are insoluble in water, neutral salt solutions, dilute acids and in the common organic solvents.