Change Header Wrapper and Footer Wrapper width in Gridmarket???

I have been able to make the header wrapper transparent, different colors etc, but I cant seem to make it the same width as the menu and the main page. I will attach an image to explain a bit better. I would like the blue area to be the same width as the main page and the footer the same width also.. I was able to change the footer to the same width, but the background image stopped at the top of the footer so it looked goofy.