Customize Product Page Background Color - 7.0

Site URL: https://www.laenovesedesigns.com/new-arrivals

I am trying to add a background color to all product pages on this site: https://www.laenovesedesigns.com/new-arrivals

But am having trouble figuring it out. Typically I do: 

#page-na,e {background: #000000 !important;} but that isn't working here. 

Any suggestions?  Thanks in advance.

You mean product list page or product detail?

for site content or both (site content, header, footer)?