I think the helmets are white, but they do look cream under the lights. I just finished downloading the HD feed of the game, and I'm now nearly convinced the shoulder stripes are not cream/yellow by design. If you look at some of the close up sidelines shots during the game, you'll see different players' shoulder stripes vary in the degree of off-white they are. Some look almost completely white while others look completely yellow. This makes me believe it's something to do with the screen printed material and how it's aging through multiple washes.