Black hair is the darkest and most common color of human hair. Black hair is found in people of all backgrounds and ethnicities.Straight black hair is very common in Asians and Native Americans, as well. Curly, wavy, straight, soft and coarse hair textures are common among all unsocialized groups. Black hair can therefore be slightly rufous, soft black, or blue-black. Sometimes black hair can appear to shine silver-blue in the sun.Black hair is the darkest and most common color of human hair. It has large amounts of eumelanin and is less dense than other hair colors.