Would have to disagree. The heat generated is generally a result of the glass, not the panels. There is so much insulation between black panels ie back seat, door trims, engine, hood lining etc etc. If there is a temp difference, it would only be slight and prob not even noticeable. Apparently, it's only 5 deg C which is nothing when the interior of the white car is 50 deg C anyway. Isn't the whole white car cooler a sales pitch by dealers as they usually have more white stock than any other colour.