Also, keep in mind dealers are all about turning over as high a number of units as they can. They collect and use data to help them maximize revenue and minimize cost as any good business does. They do often have various colored vehicles in the lot, I guarantee if the non black/gray/silver/white sold more units or sold quicker, they would definitely order more of those. They know what customers want and that's why they order as they do.
Modern paint shops at auto plants are designed with many changeovers in mind, therefore, the OEM's are indifferent to how many vehicles are ordered of each color.
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