Roan horses

Roan horses have otherwise solid colored coats, but with white hairs interspersed. The white hairs are not actual spots, but single white hairs mixed with the darker coat color. You'll find descriptions and pictures of some common roan colors below. 

The Roan Gene can be applied to any color of horse. The most common are Red Roans, Bay Roans and Blue Roans. There are also Palomino Roans, Red Dun Roans, Dun Roans, Buckskin Roans, etc. The Roan gene adds white hairs into the body of the horse. The legs and head are not affected and will remain darker then the body. The mane and tail are usually not affected, but some may have some white hairs mixed in.