I don't believe the blue is going to change although going a little more "power" could be a cool touch. I know a lot of Penn State fans like the numbers on the helmet and want to see them come back. I for one do not. To me, Alabama is the iconic number-on-the-helmet team. While I recognize the history PSU has with the numbers, they haven't been worn since the mid/late 70's. The clean white sides of the helmet is what Penn State is known for, but I guess for 1 game it'll be interesting. The biggest change (and you might laugh) is that they'll be wearing white cleats. Penn State has always worn black shoes, at least in my lifetime.
Honestly, they should have worn them on Staurday. Throwback vs throwback. If some 60 year old woke up from a coma and watched the game, they'd have been awfully confused.