Coat color refers to the pigmentation of an animal's fur, hair, or feathers. It is determined by genetics and can vary widely among species. Common coat colors include black, brown, white, gray, and various combinations, such as brindle or spotted patterns. In domestic animals like dogs and cats, coat color can also influence breed characteristics and may be associated with specific traits. For example, certain breeds of horses are known for their unique coat colors, which can affect their value and desirability in competitions.