5 Colorants and Colorant Mixing
Pigments and Paints
Pigment based art materials & Color theory (Tamas Majoros)
Information on 40012 art products (colour pencils, pastels, watercolour, acrylic, gouache, oil paints etc.) with 4459 hand made swatches, plus a practical colour mixing tool for predicting colour mixes of actual paints .
The color of art - Pigments (David Myers)
CAMEO database (Museum of Fine Arts, Boston)
The Conservation and Art Materials Encyclopedia Online (CAMEO) is an electronic database that compiles, defines, and disseminates technical information on the distinct collection of terms, materials, and techniques used in the fields of art conservation and historic preservation.
Handprint guide to watercolor pigments (Bruce MacEvoy)
ColorAcademy - Artists' palettes and colour mixing (Don Pavey and Roy Osborne)
https://web.archive.org/web/20150312013900/http://www.coloracademy.co.uk/Online/index.html
Comprehensive survey of historical palettes from archived version of the extensive but otherwise unavailable website by Don Pavey and Roy Osborne.
Wild Pigment Project (Tilke Elkins )
Colour theory in two minutes (Stephen Westland)
https://colourware.org/2018/06/25/6-dyes-and-pigments/ (6. Dyes and Pigments)
The dimensions of colour (David Briggs)
http://www.huevaluechroma.com/045.php (object colour)
Pigments through the ages (Webexhibits).
The Pigment Timeline Project (UCL)
Oil color palettes (Aaron Miller)
Colorwell (John Morfis)
Find oil paints of a given Munsell notation, and find shading series for any Munsell notation.
Pigments for paints, coatings and inks (Special Chem)
Excellent overview
Coatings and color chemistry
Colour Context (Max Planck Institute for the History of Science)
Database on historical colour practice and knowledge including glossaries and links to online versions of original sources
Toch, Maximilian, Materials for permanent painting (1911)
Laurie, Arthur Pillans, The painter's methods & materials (1926).
Gettens, Rutherford J, and Stout, George. L., Painting material - Short encyclopaedia (1942)
Subtractive Mixing Theory
The dimensions of colour - Section 5 Subtractive mixing (David Briggs)
http://www.huevaluechroma.com/051.php (subtractive mixing)
http://www.huevaluechroma.com/052.php (ideal subtractive primaries)
http://www.huevaluechroma.com/053.php (subtractive complementaries)
Handprint (Bruce MacEvoy)
Colour theory in two minutes (Stephen Westland)
https://colourware.org/2018/06/27/7-subtractive-colour-mixing/ (7. Subtractive Colour Mixing)
https://colourware.org/2018/07/05/10-optimal-subtractive-primaries/ (10. Optimal Subtractive Primaries)
Paint Mixing
The dimensions of colour - Section 6 Mixing of paints (David Briggs)
http://www.huevaluechroma.com/061.php (mixing paints)
http://www.huevaluechroma.com/063.php (paint-mixing principles)
Frank Reilly, The Reilly papers (John Ennis)
http://ennisart.blogspot.com/2010/12/reilly-palette-reilly-neutrals.html
http://ennisart.blogspot.com/2010/12/reilly-palette-palette-of-convenience.html
Entries on the palette and paint mixing from the hand-written lecture notes of Frank J. Reilly, a highly influential American teacher from the mid-20th century, who devised an elaborate system of representational painting based on the Munsell system.
Munsell unlocked my palette Part 2 - How artists can mix any colour they want (Paul Foxton)
https://munsell.com/color-blog/mixing-paint-colors-paul-foxton-part1/
https://munsell.com/color-blog/mixing-paint-colors-paul-foxton-part2/
Principles of colour matching in paints using the Munsell framework.
Colour mixing for oil and acrylic painters (Paul Foxton)
Practical demonstration of colour matching in paints using the Munsell framework.
Colour mixing tools (Zsolt Kovacs-Vajna)
Suite of free programs comprising: Color2Drop (a program to convert RGB, Lab or Munsell HVC color coordinates into paint mixing recipes), Drop2Color (a program to visualize the color of mixed paint recipes) and RS2Color (a program to visualize the color of reflectance spectra).
Golden Paint Mixer (Golden Paints)
Online program that predicts mixtures of various Golden Paints ranges needed to match a selected RGB colour.
Sensual logic paintMaker (Christian Skeel)
Online program that predicts mixtures of various ranges of artists' paints needed to match a selected RGB colour, based on various ranges of Zsolt Kovacs-Vajna's colour mixing tools.
Subtractive color mixture computation (Scott Burns)
Oil painting assistant (Mike Rozak)
https://web.archive.org/web/20130409032856/http://mxac.com.au/
Pioneering attempt at an oil painting app.