Changing the background of a siteorigin editor box

I’m a complete novice but I’ve used page builder from site origin to make a lot of headway on my site. Love it. I’m having trouble right now with changing the background color of a siteorigin editor box. I click on “edit row.” From there I click on “design.” From there I select the background color I want the row to be and click “done.” However, when I preview the page. the row still has a standard white background.

What am I missing?

Thanks!