As an old-timer, I can tell you that modern automotive paint is off the charts gorgeous end of a quality that would have looked like alien technology in the
1970s. One color you will see frequently is a metallic red that consists of the red pigment with fine metal particles that give it a deep glimmer. 30 years ago the only way you could get that was a very expensive coding process that required 10, 12, 20 layers of paint. Now anyone can get it on their Corolla for little or no markup.
Another piece of trivia is that Fender, the guitar company, has often used automotive paints for its guitars. The reason is not just availability and durability, but that it accurately tracks recent color trends.