Wikipedia is your friend:
http://en.wikipedia.org/wiki/List_of_colors-
Red horse: Amaranth, Auburn,
Carmine, Vermilion
- Black horse: Obsidian, Onyx
- Pale/green horse: Mint
Pity there isn't a brownish horse, because I love the names Fallow or
Fawn for a brownish horse.
"How do you pick up the threads of an old life? How do you go on... when in your heart you begin to understand... there is no going back? There are some things that time cannot mend... some hurts that go too deep... that have taken hold." ~
Frodo Baggins