Stoneteller, Indigo, Warrior, Sky Blue Dancer
Stoneteller because it sounds like a horse who is strong and handsome but also gentle. Also it's from Warrior Cats! I don't know why I like the name Indigo, but I think it would suit a dark brown paint horse.
I like the name Warrior because it sounds like a very majestic and proud black stallion. Sky Blue Dancer is a beautiful name that I made up. It sounds delicate and gentle. It would definitely suit a mare with that sort of personality.