Why do the colors of average quality cars doesn't seem to be diverse enough?

Brands like Toyota, Honda, Nissan, Ford, Acura, Kia, Dodge, etc. Tend to sell their cars with boring and opaque colors like gray, black, dark red and pretty much colors with no vividness. Don't you guys think they would sell more cars if they came up with more interesting colors like purple, yellow, green and other colors that could be more appealing to the eye?

Personally, I would never want a purple or yellow car. But, I have a green one.

No, they wouldn't. If they thought people would buy a lot of purple cars, they would make them that way.

Car manufacturers and car dealers are in business to SELL CARS. They prefer to paint their cars in colors that the MOST people want to buy. If they paint a car an odd or unusual color, it takes longer to sell and dealers want to move cars off their sales lot as quickly as possible. If you want a special color that the manufacturer doesn't offer, you can always have your car repainted by a professional auto body shop.