I’ve been digging through the theme js and css files trying to find how this is being called but not having luck disentangling it. I noticed when the 404 page background wasn’t changing despite replacing the image file. Little help?
Basically, it shows the demo source when you import the demo content. In this issue, you just need to reselect the image from your media library to fix the issue.
Thanks for the quick note back, this is coming up with the 404 page, and there doesn’t actually seem to be options for managing the background image of through wp-admin.
Please reselect the background image from ColorHost Options -> 404 Page to fix the issue. Check out the screenshot as a reference http://prntscr.com/m9ka9o