ColorZilla is a web browser extension for Mozilla Firefox and Google Chrome.
ColorZilla is add-on that assists web developers and graphic designers with color related tasks – both basic and advanced.
ColorZilla includes a Color Picker, Eye Dropper, Gradient Generator and many additional advanced color tools.
With ColorZilla you can get a color reading from any point in your browser, quickly adjust this color and paste it into another program. You can analyze the page and inspect a palette of its colors. You can create advanced multi-stop CSS gradients.