I've always been a sucker for a hunter green on my bright bay (now if only I could get the money to get some matching tack
), I always love to compliment their natural color, so I use a lot of dark black as a compliment color- it makes Indie's black points stick out more.
You can also look at some reds, sometimes they don't clash too badly and can really make you look flashier.
Edit: By the way, Kelly is gorgeous! Love her color and her build.