Under construction! Please see also Digital Colour Specification and Spaces and Online and Downloadable Programs on preceding page, 6 Colour Order Systems.
The Hitchhiker's Guide to Digital Colour (Troy Sobotka @troy_s)
Includes a superbly presented and authoritative step-by-step introduction to digital colour,. followed by some stimulating explorations of more controversial questions.
Myndex
Massive catalog of Myndex Research content, including APCA articles & documentation, related code repositories, and great resources on visual perception relevant to legibility of text.
Color & Contrast (Nate Baldwin)
New site full of excellent explanations and interactive demonstrations on topics from physiology of the eye through to colour spaces, colour formulae, device colour modes and UI & data visualization.
Colorwiki (CHROMIX Inc.)
Mix of user-edited and authored articles mainly concerned with colour management.
John the Math Guy (John Seymour)
"Applied math and color science with a liberal sprinkling of goofy humor".
Colour science
Nine degrees below (Elle Stone)
https://ninedegreesbelow.com/ especially:
https://ninedegreesbelow.com/photography/articles.html (articles on colour management)
https://ninedegreesbelow.com/photography/xyz-rgb.html (painless Guide to XYZ, RGB, ICC, xyY, and TRCs)
Color management, photography and painting using free/libre software.
Color management and colorimetry (Marcelo Copetti, in Portuguese)
Introduction to color in digital filmmaking (Filmmaker IQ)
Academy Color Encoding System (ACES) forum
See also the ACES YouTube channel.
An interactive review of Oklab (Ralph Leviens)
Perceptually uniform color models and their implications (Max Bo)
https://observablehq.com/@mjbo/perceptually-uniform-color-models
FilmLight
Growing collection of videos on various aspects of digital colour technology in cinema
The history and science of color film: From Isaac Newton to the Coen Brothers (Filmmaker IQ)
Good detailed discussion of history of colour technology in cinema (following a very muddled account of Young, Helmholtz and Maxwell!).
Billmeyer, Fred W., Principles of color technology (1981)*
The Pointer's gamut (Kid Jansen)
The coverage, in terms of chromaticity, of real surface colors by RGB color spaces and wide gamut displays.
Applied color theory in Photoshop (Dan Margulis)
Discussion group
The first ten years of Photoshop (Jeff Schewe)
*Titles marked with an asterisk were published between twenty-five to one hundred years ago and are available to read online for an hour at a time or be borrowed (subject to a wait list) for 14 days, but can not be downloaded.