The problem is that the red R2 unit is just riding next to C3PO and looks exactly like R2, just red. There isn't much else Adywan could have done; the only viable way of adjusting that scene would be to remove R2 altogether and then replace him at the front.
Bingowings is right, of course. We're all terribly pasty looking over here. The lack of UV makes us all pale and moody. By 2050 we'll be a nation of albinos.