On the mach-e reservation form, colors upgrades cost $400-$600 additional, depending on how many "coats" are needed... except for the GT trim level. For the GT, there is no extra charge for any color option. If you picked "star white" you would save $600 with the GT trim over the premium trim. Why is that? Do you think it is just a bug in the reservation form? I know that prices are not final and that it is just an estimate, but it seems strange to me that the GT would price colors differently.