You need to understand basic color theory.  Period.  It is just that simple. 

One exception: if you are legally color blind, maintain a closet full of Garanimals, have no plans to paint any part of your house, have turned over all decorating responsibilities to a significant other and will never be required to create a chart, graph, illustration, presentation, document, video, web page or any other visual form involving color…then you get a pass.

But everyone else needs to understand basic color theory.

Why? For the same reason you need to be able to speak, read and write. Color communicates. It has meaning. It evokes emotion. It triggers reaction. It conveys feeling. It adds depth. And if you don’t understand how colors complement, contrast and interact, you are functioning with a very limited visual vocabulary.

Don’t undermine your ability to communicate with the world.  Learn about color theory.