I know most web tools use the 216 or 256 color pickers and this may still be a good place to start, but many of us have given up on limiting our colors to 256. Somehow the built in colorpickers have not kept up.
A chance for a step up on other tools. -- <http://forum.pspad.com/read.php?2,34725,34725> PSPad freeware editor http://www.pspad.com
