Palomino is a coat color in horses, consisting of a gold coat and white mane and tail. Genetically, the palomino color is created by a single allele of a dilution gene called the cream gene working on a "red" (chestnut) base coat. However, most color breed registries that record palomino horses were founded before equine coat color genetics were understood as well as they are today, and hence the standard definition of a palomino is based on the coat color visible, not the underlying presence of the dilution gene.