Eyedropper Grab any color from the screen. Excellent freeware tool,
the best eyedropper I've seen.
Colorschemer Create harmonic colorschemes based on the colorwheel.
Read the tutorial on the site for a short but good intro
to the "basics" about colours
Monitor setting Verify and adjust the color setting for your monitor at
this page
Visibone
colorlab Visibone colorschemes, cards, charts, mousepads suitable
as references, downloadable swatch Libraries. Excellent
material about colours in general
Colour vision test Test yourself for colorblindness at "Optometry & Neuroscience" at Manchester, remember to look straight into the screen, especially important for LCD screens
Articles and Tutorials
Click on heading above for content
Make A splash about color Excellent site with great info about hue, saturation, brightness, filtering etc. Learn your colour ABC here and a lot more !
www.colormix.com Compose your own gif-tile suitable as background or
filler
Web page design Good intro to the basics about formats, palettes,
dithering etc.
Colormatters Articles about colours covering everything from webdesign
to usage of colors in the "real" physical life
Virtuel color
museum Color order system in art and science. Facinating
reading, discover the origin of our thinking about color
Color Theory 101 Excellent article covering the basics in colors, from
WebVoodoo's WebDesignClinic.
Colorspeak Exploring how we perceive and associate colors with
words, sounds, people, emotions, and events
Do you have a website ? - then read this:
colors4webmasters.com has a top10 placement at several searchengines
(thats probably why your ended here) !, would you be interested in learning how to do the same with your website and more !?