This is a RGB color chart .It can be used to modify background and other color elements for use on web pages.This chart can help you to easily and quickly experiment with text,link and background colors without having to know anything about hexdecimal codes of RGB values.All you have to do is pick the color code you like from the chart and insert it into yout HTML document.
To download,place your mouse cursor somewhere over the color chart and click the right mouse button.Then select "Save Image As..." and it's yours!