I think it’s kind of common to have the background for the whole document and then have an overlay with a solid color (and maybe less-than-100% opacity if you’re daring) on which the main content with all the text is shown. This works best for browser that are full screen on PC screens of course where you want to limit text width anyways. On mobile or narrow windows, you don’t have a lot of space to show the background.

Thanks. I'm already doing something similar, but I feel like the background that is visible on the sides is still somewhat distracting. Might be my imagination though.