I agree with Jillianne. I would show her what it would look like. Non quilters just don't understand. My SIL who is an art teacher used to try to get me to put together some weird color combinations that just didn't work. He would talk all this color theory and complimentary colors etc. Some of that just doesn't work in a quilt.
TO add those colors to an OSU quilt just wouldn't look right. Most true OSU fans would die at adding brown or tan to anything OSU. Good luck educating her.