Final answer:
Red hair contains the pigment pheomelanin, providing its distinctive red color, which is different from eumelanin that results in black and brown hair colors.
Step-by-step explanation:
Red hair contains a pigment called pheomelanin, which is not found in hair of any other color. Unlike eumelanin, which provides black and brown hues, pheomelanin gives a red color to the hair. This type of melanin is less common than eumelanin, and individuals with red hair have a higher concentration of pheomelanin in their hair follicles. Melanin production can be influenced by genetic factors and exposure to UV rays, which can affect both skin and hair color.