The Dimensions of Colour (me):
Handprint (Bruce MacEvoy):
ColorAcademy (Don Pavey and Roy Osborne).
Color in Design and Applied Art: A Selective Annotated Bibliography (Marian-Ortolf Bagley and Barbara Ann Caron, 2011). Five hundred selected books on colour
Visual Perception and Aesthetics (Steven Ståhlberg).
Color Vision and Art (Webexhibits).
Color Printing in the Nineteenth Century.An Exhibition at the Hugh M. Morris Library University of Delaware Library, Newark, Delaware, August 27 - December 19, 1996.
The Color of Art: Pigments (David Myers)
Paintmaking.com (Tony Johansen): Large site on pigments and their history.
Handprint guide to watercolor pigments (Bruce MacEvoy)
Artists' Palettes and Colour Mixing (ColorAcademy)
Pigments Through the Ages (Webexhibits).
Applied Color Theory in Photoshop (Dan Margulis)
The first ten years of Photoshop (Jeff Schewe)
"Colors for data scientists. Generate and refine palettes of optimally distinct colors"
http://genopal.com/ (get colour scheme from a photo or by setting proximity to starting colour)
Color Symbolism Chart by Culture (Jennifer Kyrnin)
Color Communication & Symbolism.