Which is the best color? Is there a method to create the best colors in a painting?

A color represents a mood or an emotion. The best colors come out when you are in your highest state of awareness. That is the only way to judge a color. It is not logical. You can learn color theory and methods for professional drafting or even emulate a color that you see as interesting. But great, consistent color patterns in a painting come only when you are in your highest state of awareness