Mule is similar to both donkey and horse, not only in terms of appearance, but also in nature and behavior. It is highly patient, sober and tolerant like a donkey and courageous, vigorous and strong like a horse. The coat of a mule is almost similar to that of a horse. The less common colors are white, palomino, buckskin, roans and dun. Mule are interesting in behavior. Source
Mule
Facts about Mule