When Higgins tweeted Tuesday night for the first time in two weeks, it was just an emoji of a blue cap. What did it mean? Nobody knew, but the tweet had more than 500 replies within 20 minutes.

Cap and gown: Blue Hood: Lined in blue and gold. The velvet border is 2" wide at the bachelor's level and the color of the border corresponds to the academic discipline. Tassel: Color corresponds to ...