We know that colour is a psychophysical experience of an observer which changes from observer to observer and is therefore impossible to replicate absolutely. In order to quantify colour in meaningful terms we must be able to measure or represent the three attributes that together give a model of colour perception. i.e. light, object and the eye. All these attributes have been standardised by the CIE or Commission Internationale de l’Eclairage.
The colours of the clothes we wear and the textiles we use in our homes must be monitored to ensure that they are correct and consistent.
Colour measurement is therefore essential to put numbers to colour in order to remove physical samples and the interpretation of results.See:Colour measuring equipment
Colour Space and Colour Theory
In the arts and of painting, graphic design, and photography, color theory is a body of practical guidance to color mixing and the visual impact of specific color combinations. Although color theory principles first appear in the writings of Alberti (c.1435) and the notebooks of Leonardo da Vinci (c.1490), a tradition of “colory theory” begins in the 18th century, initially within a partisan controversy around Isaac Newton’s theory of color (Opticks, 1704) and the nature of so-called primary colors. From there it developed as an independent artistic tradition with only sporadic or superficial reference to colorimetry and vision science.
We might object that the heart makes heart sounds and jiggles water in the pericardial sac. Stuart Kauffman