Create full-width sections on pages within the "wrap"

Hello – I’m hoping to create some full-width sections on a few pages of my site to call out certain information. I want to do this using divs instead of creating widgets, because all in all I’ll have about 25 unique sections, all with different content, across multiple pages (I don’t want to make a widget for each and every one). I’ve used Firebug to inspect the current theme setup and it seems that all the content on every page is contained within a “wrap” that is set to 1280px. That’s fine for the text, but I want to make the background color in these sections extend the full width of the page. Is this possible to do using CSS, to override the wrap settings? I’ve had success in doing this in the past by making widgets, but as I said I don’t want to make widgets for this. Thanks!

EDIT: Here’s the link to the page I’m working on
http://newsite.g2capitaladvisors.com/technology-and-business/