ABSTRACT
This chapter describes ways in which colours of light and colours of surfaces can be described systematically. ‘Colour’ is not something separate from ‘light’: it is a sensation created in the process of visual perception. Chapter 2 explains how we perceive different colours when exposed to different wavelengths of light. This, though, is not the whole story: there is not, in general, a one-to-one correspondence between mixtures of wavelengths and the colour that we see.
