one of the more uniquely colored horses are roans. Since they are a pattern of white hairs mixed with their body hairs, they can look like a different color depending on the season. In this case, this is a black horse with a mixture of white hairs, but the color is called blue roan. This mare is a dark blue roan, but in certain lights they can look blue, hence the name. The color helps her blend in with the badlands landscape in Theodore Roosevelt National Park.