Color Section Background Image Issue

I would like to have text appearing on top of an image background at the top of a page. I am trying to use the color section to insert the image background and a text block inside it for the text. This works as desired on my IOS phone. It does not work on the desktop Chrome, IE or Firefox browsers. On Chrome, I don’t see the image at all. On IE and Firefox, I see a tiny image above the text. How can I make this work everywhere?