Kinda handy little color scheme tool - I recommend this when I can see that someone doesn't have much of an eye for color coordination.
http://www.genopal.com/online.htm#
I much prefer Absolute Color Picker by Eltima Software. When you see the perfect shade that you want to use for your menu - in the background of the photo that some coworker sent you of his hideously ugly child, whom he constantly asserts is the cutest kid ever - this is the easiest, fastest way to get the color! Click a button, drag the cursor to the color you want, and there you have the HEX value. Copy and paste into your CSS and voila!
http://www.eltima.com/products/free-color-picker/
I heard this has some scripts for those who don't feel like writing their own, or want to learn by examining other developers' scripts:
http://dynamicdrive.com/
(haven't really had a chance to check it out yet...)