re: LSU Vs. Badgers game color

I think the LSU rule of thumb is white for SEC games, white for home opener, white for power 5 OOC games. We wore white against Washington in 2012 and purple for the other 2 OOC games. This makes sense because obviously LSU wants to stick to its big traditions in big games. Even though Washington wasn't a very strong team that year they were still a much more respectable opponent than most OOC games.

ETA: Of course though there are exceptions like 2004 Oregon State. Although I've heard that was more to spare them from wearing black in the Louisiana heat.