That would look terrible. That combo is the reason we initially rejected the white helmets:
Again, call me a contrarian, but I actually like this look. I think it makes a pleasing and efficient use of our three colors there -- cardinal, gold, white -- and has just the right amount of white in the jerseys and pants to balance out the bright white of the helmet.
As others have noted, our current I-State logo just looks the best on a white background, which means I think we need to adapt the rest of the look to having white helmets be a pretty constant part of the kit. The road uniforms do that well; now for the home ones.
What you see above is bacially Wyoming's uniform, only with cardinal instead of brown...
...which I have always thought is a pretty good, unique, distinct look.
Doing the white helmet on our current jerseys without the white pants (the Texas Tech look last year) would look very imbalance, but if we had more white elements in our home jerseys, which everybody seems to like the idea of, I think it could go very well.