How to create a template for Pages and Post the Removes the body background?

How to create a template for Pages and Posts the Removes the body background? I am referring to the background that looks like white paper under a post or page… I need to create a template where i can create a page/post that the embedded objects only appear over Backplate Photo with no body backplate… so if there is someway to make that element 100% transparent or remove element completely solely for this one format I would really like to know… Thank you for your help WP is the Bomb!