When i was working on my novel the pages turned blue, i have tried to get them back to white but to no avail. Is there something i did that i have not been able to take the blue background back to white?
Maybe that was some kind of Night Mode activated by your OS?
Or changed the Document background color (choose Tools - Options… - LibreOffice - Application Colors).
Select Format - Page Style, then Area tab. Click None to get rid of the background color.