Megabytes

Colorzilla is a great little add-on to Firefox that provides color information for the web page you are viewing. It includes an eyedropper and color picker, and now with version 2, the Webpage DOM Color Analyzer and Online Palette Viewer.
Both of these are useful additions to an already handy web developer tool. Quickly find out the hex color code for a particular item on a page. With the Color Analyzer you can find out what CSS rules specify a given color. The Online Palette Viewer allows you to create a color palette based on the colors of the web page.
Here you see the Color Analysis for my blog, Megabytes. When you hover over any color square in the palette at the bottom of the screen, the tool tip provides both RBG and HEX color info. Further, the item(s) on the page which use this color, are highlighted. Click on a color square to see the CSS rules that specify that color.

I recommend installing Alex Sirota’s Colorzilla into Firefox. Oh, and using Firefox - well, that’s a given!