Billmeyer and Saltzman's Principles of Color Technology by "Historically, questions such as "Do these two colors match?" have had only subjective answers, based on the skill and memory of the trained color matcher. Fortunately, through the application of the principles of color technology and the use of color measurement, it is now possible to provide objective answers."
-from Principles of Color Technology by Roy Berns
Measuring Colour by 
Color Vision and Colorimetry by 
Digital Color Imaging by 
Colour Image Science: Exploiting Digital Media by 
Colour Imaging: Vision and Technology by 
Digital Images and Human Vision by 
Digital Color Imaging Handbook by 
The Reproduction of Colour by 
