I think it is quite amazing how dated this book has become because of the growth of computers and screens in graphic arts. However, it really is a very thorough introduction to the basic principles of colour ...especially for designers. Maybe less so for artists. It has a great set of samples of the various colour relationships with varying hue, value, saturation. (Or in other words (my words): colour, grey tone, brightness).
He explores the psychological impact of juxtaposed colours and optical illusions, harmony and even has a section on colour on the computer.
However, one of the things I noticed was the current availability of Apps which can analyse a photo in terms of colours and produce instant palettes that complement these basic colours etc. And these are not mentioned in this book which was published in 2005. However, a good hint is given on p143 about printing your own colour chart to get an idea of how your colours are likely to look when printed.
Quite an impressive work overall. I give it 4 stars.