Color recollection : visual memory -- Color reading and contexture -- Why color paper : instead of pigment and paint -- A color has many faces : the relativity of color -- Lighter and/or darker : light intensity, lightness ; Gradation studies : new presentations ; Color intensity : brightness -- 1 color appears as 2 : looking like the reversed grounds -- 2 different colors look alike : subtraction of color -- Why color deception? : after-image, simultaneous contrast -- Color mixture in paper : illusion of transparence -- Factual mixtures : additive and subtractive -- Transparence and space-illusion ; Color boundaries and plastic action -- Optical mixture : after-image revised -- The Bezold Effect -- Color intervals and transformation -- The middle mixture again : intersecting colors -- Color juxtaposition : harmony : quantity -- Film color and volume color : 2 natural effects -- Free studies : a challenge to imagination ; Stripes : restricted juxtaposition ; Fall leaf studies : an American discovery -- The Masters : color instrumentation -- The Weber-Fechner Law : the measure in mixture -- From color temperature to humidity in color -- Vibrating boundaries : enforced contours -- Equal light intensity : vanishing boundaries -- Color theories : color systems -- On teaching color : some color terms ; Explanation of color terms ; Variants versus variety -- In lieu of a bibliography : my first collaborators.