Horses are as strong as they are majestic, and are undeniably one of the most beautiful animals on Earth. They’re also very diverse and come in a surprisingly large variety of colors. In this list are some of the rarest variations of horse color that exist… I’ve been around horses my whole life, and some of these I hadn’t even heard of before. They’re stunning! They may seem fairly common, but grey horses are actually the result of artificial breeding selection. All grey horses’ hair eventually fades to white, but a grey horse’s skin is black, whereas a white horse’s skin is pink.