Perception and Colour: Notes on the octahedron in Wittgenstein

Abstract

The  perception  involves  a  lot  of  enigmas,  the  unity  between  its content and form not always looking to be assured. Such enigmas are exemplified  by  the  optical  illusions,  by  Molyneux’s  famous  problem  and  also,  as  it interests  us  here,  by  the  problem  of  the  expression  of  colors  in  chromatic models, which express logical incompatibilities, but which refer to the territory of experience itself with colors and pigments. In this paper, we will distinguish two uses of Farbenoktaeder by Wittgenstein by registering the difference, which we consider relevant, between ample incompatibility and restrict incompatibility among colors.