Did you know that there are no true albino horses in the world (white coat, pink skin, pink eyes) because for some reason it is lethal to horses.
If there is such a horse, its ither still born or dies within two weeks. There is also a LWS (lethal white syndrome) aswell, common genetic disorder mainly with American Paint Horses. born all white and has a non functioning colin( extracts water from feases).

Also True white horses are rare! a horse with white coat and pink skin is a true white and they usually have blue eyes or brown eyes.
Also one more fact about horse coat color!

True black horses are uncommon but not rare! there are two types, non-fading black and fading black. fading black horses fade to a brownish color when normally expsed to sunlight on rebular basis, and non fading have like a blueish black coat. visually you can tell the difference between a true black horse, and a dark bay or dark brown horse because a true black horse does not have fine brown hair around the muzzle and eyes.