WooCommerce Container

I’m trying to add a container to the central content of my store. On all other pages, there is a white container so you can read the font over the background. I’m trying to copy the same thing to the store so that you can read product descriptions.

Unfortunately, my site isn’t live and I’m not sure where to locate the code I’d need. Any assistance in tracking this down or guidance in how I can better provide information would be greatly appreciated.