This is such an idiotic thing to have on their cover spines it breaks the consistency, if you have a green and then one with purple/red or what have you. It also happens to be on 3DS, NGC, Wii and Wii U game covers too.
The Americans have the better of it, i.e, no colour difference on their spines
The Americans have the better of it, i.e, no colour difference on their spines