Changing Background on Blog Site

Hi,

I use the Theme Inspiro and imported the Elementor Demo Data. I want to change the background color of the page to #FAF1E0

So I changed for every Section the style to this background color in Elementor. But the blog site cannot be edited with Elementor, the background is white. How can I change the background color of the blog site?

I already tried CSS

 .site { background-color: #FAF1E0; }

But it is still white. How can I change the background color?