More information on Ida Kohlmeyer. More information on Ulfert Wilke. They are called primary because they cannot be produced by mixing other colors. This sculpture also uses some intense colors. Intensity is the saturation or strength of a color.
Vivid colors have high intensity and dull colors have low intensity.
Compare the intensity of the different yellows used in this sculpture. The form of this sculpture also is symmetrically balanced. Form is a three-dimensional shape. Symmetrical balance is achieved by making both sides identical. Even though the sculpture is symmetrical in form it is not symmetrical in color.