Sams Teach Yourself HTML and CSS in 24 Hours (7th Edition)

Microsoft Design Gallery Live:

http://dgl.microsoft.com/

Barry's Clipaart Server:

http://www.barrysclipart.com/

HTML color picker:

http://www.pagetutor.com/pagetutor/makapage/picker/

RGB Triplet Color Chart:

http://quasar.unl.edu/tutorials/rgb.html

Color Blender:

http://www.meyerweb.com/eric/tools/color-blend/

Color Schemer Online:

http://www.colorschemer.com/online.html