Internet Explorer
On the Tools menu, click Internet Options. Click the Advanced tab. Under Settings, scroll down until you find the Printing category. Make sure Print background colors and images is checked, and then click OK.
Firefox
On the File menu, click Page Setup. On the Format & Options tab, under Options, select Print background (colors & images). Click OK.
Safari
On the File menu, click Print. On the Copies & Pages pop-up menu, click Safari. Select Print Backgrounds. Click OK