With the exception of rare genetic mutations, paint and pinto horses have no more than two colors: A primary base coat color plus the bold white markings emblematic of a pinto coloring. Tricolor paint horses have not been identified. Note that bay (a brown horse with black mane, tail, and sometimes legs) may make a pinto appear to be three colors, but when the base coat is bay there will never be clear separation between white, brown, and black spots. Similarly, horses going grey may change color unevenly, creating the appearance of a tri-color paint- however their coloring is still white + basecoat modified by the grey factor.