They're the Tar Heels. The color should be black and what's the deal with the ram or goat or whatever they have as a mascot. It's like freakin' Auburn. Make up your mind, War Eagle or Tigers - pick one.
Edit: Let's throw Ga Tech in there as well. Ramblin Wreck or yellow jackets. Again. Choose one. Not that hard.
If you have ever seen a North Carolina sky on a sunny day you will understand the UNC colors.
Also, as to Auburn, I always kinda liked the Plainsmen nickname. Very evocative of the drive to Toomer's Corner.
http://www.southernpigskin.com/sec/plainsmen-tigers-eagles-oh-my/