No, this isn't your RGB grid, or 216 color safe palette, or anything like that. Though useful in their own right I had a need to find a color picker/grabber from my screen. Enter iconico colorpic.
Very cool little interface, stays on top, magnifies so you can get up close and personal with the image you need.
One of those tools that doesn't try to do more than it should, does what it intends to do very well, works how you expect and doesn't get in my way.
If you're looking for generating a color scheme, I ran across something else that looks very cool. Try clicking on Triad or one of the others picking contrasting/complimentary colors.
Eye candy:
