how to add background colour to blog page

I have a background image set on my site but I really only need it for my home page. As is, it makes the blog posts impossible to read. Can I set the background image to be on the home page only or can you tell me how to set a background colour on the blog page so that they are readable? I can’t do coding…I’m afraid of it. I’m sure I saw settings within the dashboard previously but I just can’t find them again. It’s surely something simple but I cant get it. I’d be very appreciative if anyone can advise. Thanks

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