Recently, I had become aware of a few new color tools for web.
ColorMatch Remix is a tool based on the original ColorMatch 5k by Kim Jensen tool. The redesigned model, by Twyst, generates 9 colors, instead of 6, allows the user to output the color scheme as a Photoshop color table(ACT file format) or for Illustrator(AI file format). Dropdown selections let you load up already listed color schemes, and an input allows theme naming on other color schemes. The page is designed or developed with XHTML, CSS, and no tables.
Next up, Color scheme by Pixy.
This color tool works with several color scheme options and includes a variety of very useful visual tests or checks for color blindness, contrast, etc. Additional Color Scheme Tool Information and Help is available.