All About Color

The browser-safe web pallette
Although this does not really apply that much any more on today's computers which can display millions of colors, its good to know the history of color on the web.

Color Worqx
This is a great website on color theory.

HTML Color Code Combination Chooser
A helpful little tool to choose a pallette if you're having trouble.

Tip:
If you are using a background image, use the eyedropper tool to sample colors from the image to find a matching color pallette for your site.