The Eyedropper is easy to understand also.  Just click on a color in your image with the dropper, and it will appear on your Styles box under the Color Palette.  If you move the Eyedropper around on your image, you will see the Color Codes come up for each shade of color in your image.  And did you know that you can copy the html code for a particular color you would like for your web page?  Just click on the solid color on your Styles box and the Color wheel will come up.