Specification of the Cascading Style Sheets level 3 color-related properties.
Reviews the color properties in place in CSS levels 1 and 2 and new properties for
CSS3. This is the primary source material for the HSL, HSLA, and RGBA color definitions
and SVG color keywords used in many tables I've prepared.
Sets out the technical details for a standard color space, sRGB,
based on red, green, and blue values for use by Web software.
By Michael Stokes, Matthew Anderson, Srinivasan Chandrasekar, and Ricardo Motta. Version 1.10, November 5, 1996.
This is explained in up-to-date detail on the
sRGB Web site which includes a list of
color standards bodies.
Color names and values
The Colourlovers site contains a large set of colors to explore, including submitted colors from users and rankings of colors.
I found color names and values from a variety of sources.
COLOR Universal Language and Dictionary of Names, by Kenneth L. Kelly and Deane B. Judd. National Bureau of Standards special publication 440. Washington, DC: U.S. Department of Commerce, National Bureau of Standards, December 1976. This publication helped me prepare the Universal Color Language chart.
EasyRGB Software used for color matching, harmonies, tint searching, calculations, and monitor calibration. I used the Color mathematics and conversion formulas page to calculate the HSL, CMYK, and RGB color codes based on the hexadecimal color code. Interactive calculators on this site allow you to make many calculations.
Color Wheel Pro Software that allows you to create color schemes and preview them on real examples. Web site includes discussion of color theory.
Pixie Measures the color value of a pixel on the screen.