Personally, I also like Bear Bryant's look of a tweed hacket and the houndstooth cap. Very easy to ID the head coach. Now, the whole staff looks the same. If CPJ wants to wear navy, fine. But all of the other coaches should wear something else, like white shirts and khakis. I would think you'd want the HC to stand out.
I was watching Nick Saban at a game and he was smartly dressed in a medium gray suit, crimson (of course) tie on a white shirt. Clearly Alabama. On field, crimson pull over and khakis. All of it in stores near you.