IN DEFENCE OF NATURAL DAYLIGHT

Objects appear different as the illumination under which they are perceived varies. This fact is sometimes thought to pose a problem for the view that colours are mind‐independent properties: if a coloured object appears different under different illuminations, then under which illumination does the object appear the colour it really is? I argue that given the nature of natural daylight, and certain plausible assumptions about the nature of the colours it illuminates, there is a non‐arbitrary reason to suppose that it is under natural daylight that we are able to perceive the real colours of objects.