are there any women of color in top/mid sororities?

I'm looking through each sorority house's instagrams and I will only see one girl of color on many mid/top house accounts, if any. Do higher ranked houses generally not accept more women of color? Maybe they just don't feature them on social media? Seems odd given that Berk is known to be a very diverse campus. And if there is a girl of color in a house, is it any harder for her to feel included?