Thats quite odd.
What’s the url of your website?
Since no response, the only thing that can be concluded is that you had a malfunctioning theme or a plugin other than Patron Plugin.
The simple reason is that Patron Plugin doesnt have any code on user end which changes background colors. Hence, it cant effect a bg color change. This could have happened only through a broken css code or html via a theme or another plugin.
The only way to confirm is to check your site live, which you havent provided the url of…