Thalia's Guide: The Color Page
http://www.two4u.com/color/big-txt.html
ColorMaker
http://www.bagism.com/colormaker/
Hype's Color Specifier
http://users.rcn.com/giant.interport/COLOR/1ColorSpecifier.html
Rainbow Color
http://www.mu.org/~doug/blend/index.html
HTML elements
Basic Guides
Literature on Webpage Design
Validity and Checking
Watchfire WebXACT - program which graphically marks-up a web page with disability access and browser
compatibility suggestions. (used to be called 'Bobby')
http://webxact.watchfire.com/