Although the DMP method deals with Realism, within that you can have a more tonalistic or colourful approach. The Zorn palette or Rembrandts heavy earth colour palette are examples of more tonalistic styles.
Lately I've become more interested in adding more hues to my paintings (as per impressionism), but without overdoing it or abstracting too much. Personally I don't like the overuse of very saturated colour without the balance of more subdued tones.
I wonder what your thoughts are on Realism and use of colours?