[Theme: Blue Server] can't remove Blue box on Homepage!

hello, I’m using the Blue Server theme and am having difficulty eliminating the box in the main content section. I changed the background to white but now there is a big blue box that’s really out of place. My site is https://topdogwebhostingreviews.com/

I’ve been trying to figure this out for over a month. HELP!

Thanks,
Ann Marie

https://www.ads-software.com/extend/themes/blue-server/