She is broken cahmoisee, with a belt. I like to get fairly descriptive , I don't just saybroken, I describe markings.
I would say,
"Belted chamoisee with white splash on right rear leg, poll, and pasterns."
I'd have called her a belted chamoisee too. I'm sure broken would be acceptable too. Becky, you are WAY more ambitious than I am! I don't go into all that much detail....heck, usually they've managed to change color by the time they're a year old anyhow, lol.