This second edition has been rewritten, updated, and enlarged, describing the basic principles of colour vision and colourimetry. The history of colour is described, along with the main methods used to measure colour and their associated colour systems, and the human eye and its colour detectors are explained with some detail. The book has been written with students in an introductory colour course in mind, but those who have experience in the field will also benefit from the compendium of data within. This second edition has been rewritten, updated, and enlarged, describing the basic principles of colour vision and colourimetry. The history of colour is described, along with the main methods used to measure colour and their associated colour systems, and the human eye and its colour detectors are explained with some detail. The book has been written with students in an introductory colour course in mind, but those who have experience in the field will also benefit from the compendium of data within. This second edition has been rewritten, updated, and enlarged, describing the basic principles of colour vision and colourimetry. The history of colour is described, along with the main methods used to measure colour and their associated colour systems, and the human eye and its colour detectors are explained with some detail. The book has been written with students in an introductory colour course in mind, but those who have experience in the field will also benefit from the compendium