The shift in hues is due to an ongoing and long-standing bet between The Daily Tar Heel and the Chronicle. The day after the game the loser prints its banner in the winner's color, includes a headline of the winner's choice and the losing editor personally delivers 100 copies to the winner's office.
In today's paper, the requested headline shows up today in the little box in the bottom left corner. It's a little hard to read in the picture above, so I blew it up here for your ease of reading:
They've gotten better about losing. When I was at Carolina we'd make them print "Dean Smith is God" and in the weather section they'd give the daily temps as such: "High of 54, low of 35, Carolina sucks shit through a tube."
I gotta say though, I kinda enjoyed that high level of animosity back in the day. Seems to me, the Dookies are getting so used to losing to Carolina they decided denial (rather than acceptance) is the best course of action.
Whatever helps you get through the day.