I would describe my workshops as colour training rather than colour theory. In one day you will learn how to separate colour into its various attributes in order to use these as starting points for ideas, and  solutions for problem solving (that feeling that something isn't working but you are not sure why).
Having taught MA students and many professionals over ten years I have been able to identify the struggles that most people have with such a conceptual subject and present a way of understanding that is straightforward and extremely useful.