You have two ways that you can change this setting.
On the Internet Explorer menu bar, click on Tools and then Internet Options.
Click Ok, you may have to restart Internet Explorer for your settings to take affect.
Click on File and the Page Setup.
Put a Check in the Print Background Colors and Images checkbox.
Click Ok you may have to restart Internet Explorer for your settings to take affect.
On the browser menu bar, click on File and then Page Setup.
Check the box to Print background (colors and images).
Click Ok, you may have to restart Mozilla Firefox for your settings to take affect.
On the print screen in the options section choose Background Graphics.