Great, timely article Keith, as I am preparing to teach a workshop on values. In preparing, I revisted Greg Albert's book "The Simple Secret to Better Painting". In it he talks about the concept of "Mostly...Some...A little bit" for values and colors. It applies to your explanation of dominance, secondary and tertiary. So, I've completed three value studies of each value pattern for the students to learn by. For example: Mostly dark, some mid tones, a little bit of light. Conversely, mostly mid tones, some light, and a little bit of dark, and then a final one, mostly light, some mid tone and a little bit of dark. (Can you think of a composition that would hold together if there were "a little bit" of mid tones?....I can't think of an example...).
Anyway, next, we will use this concept and apply it to color. But without the "bones" of value to provide the road map, applying color becomes a haphazard exercise.
Thanks very much for your writing. I enjoy all of it.