I already tried that. It just doesn’t give me the look I want. I want the background image under my logo and the menu links on the top of the page. If the attachment is just a regular transparent file, I already made one to try, made the CSS adjustment, and nothing looked different.
You should try with this image as the background image needs to have transparent background and colored background in the area between logo and menu. So you can see in that area we’ve put red background here. You should try this image and see how it looks then you’ll get idea like what sort of image you need to have to achieve your goal.