In Köhler (1938) "The Place of Value in a World of Facts", Liveright; Chapter VI On Isomorphism, part II he writes: "If certain processes in the human brain are said to be the cortical correlates of phenomenal colors, it is not implied that in those processes themselves there is anything like such colors. ... the cortical correlate of the color blue is not blue". I have indeed gone beyond Köhler in relating this discussion to information theory, which had not yet been related to Gestalt psychology in Köhler's views.