Introduction

There are two aspects of computer colour. Firstly, there is the gamut of colours that can be produced on the monitor screen. Secondly, there are the computer generated printed colours. Both are limited by the state of the art. The average monitor with the normal three phosphors gives an acceptable range of colours for general purposes. Colour workers however will notice that some particular colours are impossible to reproduce on the screen, such as pure turquoise, for example. Similarly, there are several hues that the trichromatic printing system cannot reproduce.