Unless it's done superbly, as in the Japanese film Gate of Hell, color can be a very distracting element.
By drawing or exposing two or more patterns on the same bit of film I can create harmony and textual effects.
Take a film of Jacques Tati like Mon Oncle which has something quite new - for me, unique - in it.
Well rounded forms gives smooth sounds; sharper or angular forms give harder and harsher sounds.
The good moral work of art should have all the qualities that a good amoral work of art should have, such as formal unity, balance, contrast, and a sensitivity to the material out of which it is made.