Board Thread:Speculation House/@comment-4606441-20141024012020/@comment-24219008-20141024193450

Or since Yang's mother and Summer Rose were teammates, Yang's mother started wearing Summer's colors (assuming that's where Ruby got most of her color palette from) as a sign of respect after hearing word that Summer died? Maybe ALL of that team wears black and red. From what we've seen of Qrow, he seems to have a similar color palette, too, based on the flashback from Burning the Candle.