Color FAQ - Clarifies aspects of colour specification and image coding that are important to computer graphics, image processing, video, and the transfer of digital images to print.
Color Matters - Several resources about color and its relationship with other human activities.
Colorworm Explains Color: A Free Book - Both a science and an art book, Colorworm explains the electromagnetic spectrum, visible light, how we see, mixing paint, RGB, and CMYK with library look-up and a storytime cut-out. Target audience is grades K-8.
Colour Info Page - A rapidly growing site covering many aspects of colour science.
Colour Physics FAQ - Concerns the measurement and control of coloured surfaces such as plastics, textiles, and surface coatings. It is intended for practitioners rather than theoreticians.
efg's Computer Lab: CIE Chromaticity Diagrams - Demonstrate how to display a 1931 CIE chromaticity chart, as well as the transformations needed for the 1960 and 1976 charts. The charts can be displayed using either the 1931 2-degree or 1964 10-degree standard observer.
efg's Computer Lab: Spectra Lab Report - A complete Delphi program, including source code, to display wavelength colors as a function of wavelength and optionally display the emission and absorption spectra of hydrogen.