ColorZilla

ColorZilla for Google Chrome is an extension that assists web developers and graphic designers with color related tasks for 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.