Dominant white, the most confusing coat colours

My erudite readers are no doubt saddened by my grammar in that title. They are right to be, of course. But you have to break eggs to make an omelette, and when it's time to describe a coat colour with one name (kind of, anyway) but over twenty known causes, consistent use of plurals is just one of the things that I'm prepared to sacrifice.

"The Opera House" shows the colouring expected from some types of dominant white horse: no pigment in the skin or hair, but normally pigmented eyes.