NCAA undershirt

[TriggerMN]

While watching the Marquette-DePaul game tonight, I noticed that one of the Marquette players was wearing a yellow undershirt, under his jersey of dark blue with yellow trim. What is the NCAA rule for undershirts? I know in Fed rules, this is illegal, as the undershirt must be the same color as the jersey.

Also, I hate to double up, but the announcers made reference to a game that Tim Higgins officiated last night where his crew was unable to use video replay in a key spot in the game, because it was "one of those rare games where it wasn't available." Anyone have info on that?