Color in customized cover page not stretching the entire width

[pfergy]

All-

I would like to create a report cover template to be used in the future. In order to create the different colors, I added a text box and changed the fill color. When you look at it on your screen it appears to cover the entire width of the page; however, when you view in print preview there is still a white margin on each side. I changed the margins to '0' but it still shows them when printing. See attached - basically I want the blue to stretch the entire width of the page. Please help!!!