The fourth session of the Color Relationships class for Fall 2014 was held on Friday, October 31. We critiqued the third color deception assignment, making four colors appear as three. Gabe Mott visited and gave a preview of his Huedoku app, a game based on color matrices as developed by Dick. We practiced recognizing when two hues are of equal value, and saw examples of a special case, vanishing boundaries, which the Impressionists exploited to give their paintings striking luminosity. The new assignment is to transpose a set of four warm colors to a set of cool colors of equal value, in a specific format developed by Josef Albers.