The best answer to your question, is also the the most difficult to grasp. It needs to feel right. The Science of color is a wonderful place to start, but it is by the rules. With it's adherence, in time, comes boredom. Now you are thrust on a path to create and play. Learning how to break the rules is the order of the day. You will now have the chance to develop your visual "voice". Hopefully your new voice will echo in the hearts of others.