Hello, and thanks for replying.
OK, on each blog post, the Disqus commenting embed sits in the middle on a pure white background.
If I change the site/page background, the part behind the disqus embed also changes colour, like this.
What I am trying to achieve is a white centre to the blog post page behind the commenting section and the post above it, but with a narrow margin of colour on either side, like this. (That is a Blogger site just used for an example of what effect I am after).
As I say, it doesn't matter if it's site-wide, just would love that effect on the blog post pages.
If it's possible, any help would be very much appreciated.