Car Colors

My friend Vijay has proposed a new design for car colors. There are these synthetic stickers which can be pasted on top of a car & they are great enough that they hold on the car for possibly an year. Then, year after year, you can change the sticker & hence, the color too.

Whenever I'm with him, there will be at least one topic discussion on cars, brands & stuffs. Very passionate! He feels why should car have one single color all over. Why can't they be vivid, jazzy etc?