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Introduction to the philosophy of colour

This chapter explores why the examination of many different aspects of colour has been a prominent feature in philosophy. It is because, first, colours are exceedingly familiar, seemingly simple features that become enigmatic under scrutiny, and they are difficult to capture in any familiar-sounding, unsophisticated theory. Second, through colour one can confront various problems that span the breadth of philosophy, including problems pertaining to perception, the mind-body relation, the nature of science, scepticism, vagueness, meta-ethics, and aesthetics. Colour’s usefulness in philosophy is also due to colour being an enduring example of perceptual variation: the experienced colour of a jacket can change depending on lighting conditions, one’s previous retinal state, and the absorption curves of different perceivers’ cones, among other things. The triggering of colour experience by non-traditional stimuli is often classified as a form of colour illusion, and the extent and nature of colours illusions is always a crucial topic to philosophy of perception.