4096 Color Wheel
A nice page where you can click on a colourd wheel and get the color value
Color Combos
Great facility for grabbing colour palettes from other sites and the combo tester, which shows you how your colour's work on screen.
100 Random Colours
Random colour inspiration
Color Blender
This handy tool for colour matching and palette design allows you to save blends you concoct. You choose a base colour and colour blender makes the rest of the palette for you. You can then save the palette as a named blend or save it out as a small file (ACT or EPS formats available) to import as your colour palette for Photoshop or Illustrator etc.