Adjust Catch Everest Sidebar Layout

Hi there, I am using the everest theme for a long time. As I did a lot of customization I do not want to change to another theme. Is there a chance to change the layout with a sidebar so that it looks more like in the Catch Evolution theme? Sidebar should be separated clearly from the main content by a space with background colour - and also between different sidebar widgets I need this space with the background colour. Thank you very much in advance. Regards, Fabian