Jayson, good eye on the Fleet Trooper hat... They didn't color it tan ultimately, but they're definitely there.
I can't find it on Wookieepedia but Leia's troops from the Tantive IV had hats on too, in I believe either Rebellion or Empire series. Theirs, I thought anyway, were grey. I'm wondering if this is a hybrid hat then, and that's why the toy's is grey? Or if Hasbro just liked grey better maybe and decided not to go with the tan?
Ultimately it's probably a situation where they ran out of helmets, but still neat to put an image to the hat at this point.