I remember years ago, when Tim Czyzewski (Head coach at Northwestern at the time) brought in black as an "accent" color (maybe the first one to do it), and he was reprimanded by whoever....equipment manager, AD, etc. It was an issue for awhile. Now a lot of schools, high school and college have done it. You aren't going to change a schools colors or in some cases, the mascot either (I know, some schools have been forced to change mascots).