If you're into website design or just need a nice set of colours for your upcomming logo, I highly recommend "ColorBlender" – A free online tool for color matching and palette design.
It's a joy to use: Simply choose a preferred color using the color
picker below, and a 6-color matching palette (a "blend") will be
automatically calculated. Using the radio buttons you may switch to
Direct Edit mode to tweak or edit individual colors of your blend.
Blends can be saved for future use, and will be available whenever you
return to the site.
Check it out at www.colorblender.com