While grulla coat coloration is rare, it is not the rarest color in the world. That might lead you to wonder what is – and according to TheEquinest, it’s white. Albino horses do not survive for long, and instead, this refers to a “true white” horse, rather than light grays or those with diluted coat colors. Most so-called white horses will change color throughout their lives, because they don’t carry the dominant white gene, but are actually cream or something similar. Often, horses that are white in adulthood start out dark as foals.  True white horses, however, are white throughout their lives. They generally have pink skin, coupled with dark eyes. It may surprise you to learn that there is only one “true white” breed, the Camarillo White Horse. According to HorseyHooves, this elegant creature will be white throughout its life, but it is a relatively recent breed, which only began around a hundred years ago. There are also very few of them. Often, in order to keep breeding them, they need to be crossed with non-white horses, as breeding two white horses has a 25% chance of not producing a live foal. No wonder they are so rare! That said, the grulla horse coloring is still rare. They make up less than one percent of the registered quarter horses in America – so they certainly aren’t commonly found.  As more people take an interest in them and the color becomes more frequently demanded, it’s likely that this percentage will increase. However, as they are also difficult to breed, they will probably remain relatively rare for quite some time, although some breeders claim to have techniques that work reliably.