Rare Coat Colours...

He does have markings.

Depends on the breed I guess. Any decent Friesian is black with no white markings - in fact only a small star is tolerated in the registry, otherwise no white at all is allowed.

I would consider champagne, pearl, and appaloosa to be rare in AQHA.

In Equine industry we where taught that a normal black horse fades in the sun but is still black, and a Jet black or true black horse never fades in the sun and can have the normal white markings.

Quarter Horse - Silver Equine

I would consider the "rare" colours to be the ones you can't breed for - brindle, chimera, somatic mutations.

Wow! That was not was I was expecting......I was expecting my brains version of what silver looks like! Haha like I say, this color thing is best left to more patient people than myself! Thanks!

You have quite the high bar for rare

Everything else can be selectively bred for - I consider them under-represented in the gene pool, but entirely possible to become over-represented lol.

All different horses in a 30 second google search. Quite common in Arabians.
Pure blacks with no white are also quite common among Canadians and Fresians.