The Appaloosa is an American horse breed best known for its colorful spotted coat pattern. There is a wide range of body types within the breed, stemming from the influence of multiple breeds of horses throughout its history. Each horse's color pattern is genetically the result of various spotting patterns overlaid on top of one of several recognized base coat colors. The color pattern of the Appaloosa is of interest to those who study equine coat color genetics, as it and several other physical characteristics are linked to the leopard complex mutation (LP). Appaloosas are prone to develop equine recurrent uveitis and congenital stationary night blindness; the latter has been linked to the leopard complex.
Mottling on the skin is particularly visible around the eyes and muzzle. The sclera of an Appaloosa's eye is white.
Few spot leopard Appaloosa with wet coat, showing a "halo" effect of dark skin under the white coat, especially around spots.
Striped hooves are a characteristic trait.
Horses exhibit a diverse array of coat colors and distinctive markings. A specialized vocabulary has evolved to describe them.
Three horses with different coat colors
Bay (left) and chestnut (right) mustangs.