I’d like to have the main container of my site have a light background while the margins (what can be seen when the window is resized) have a dark background. It seems like there is some main container that I should be able to assign a background image to in the CSS, but I haven’t been able to find it. I have been looking in main.css
I know how to upload a background image. Doing so changes the background of the WHOLE page. I’m asking whether the theme can be edited to have separate backgrounds for the margins of the page and the main container.
Rather than having different backgrounds for the header, middle, and footer that stretch 100% of the window width (the option that is built into the theme), I wish to have a dark vertical bar on the left and right of a light main container. However, I cannot find anything (in the CSS or otherwise) that will allow me to alter the separate parts of the page.