Change featured content row color and put featured boxes below it

I just got started using this theme and I love it. I don’t understand how to achieve certain effects, though.

For example, in the demo, there’s different full width rows with different backgrounds (parallax images, colors, etc).
I’m trying to do this now, but the rows don’t seem to be filling the page. I’m using SiteOrigin PageBuilder and I made sure I set the rows to full width, but I just can’t seem to get it to work, both with Text Areas and using the page as featured content.

Also, is there a way to get the Featured Boxes to position below the featured content? Or do I have to stick to the Text Area and somehow change row colors (like I asked above)?

Website: glabcorreggio.wesavethedate.com