This course conditioned us to recognize visual values, not only in color, but also in other art and design. Quoting Josef Albers:
We worked with special color paper called Color-Aid, which we purchased in 314-sheet packs of 6 x 9 inches. Using Color-Aid as opposed to paints allowed us to focus totally on precise color, hue and intensity. We realized early on that no two people see color exactly the same way. Quoting Josef Albers:
The course helped us develop sensitivity to color and composition, further developing our visual skills.
The color used for the two quotes above illustrates one color interaction theory. Three colors, yellow, blue and green, appear as four. The green appears to be two different colors, when in fact, it is the same color. Color on color can create an optical illusion.
As Josef Albers said: