did something to each page somehow, they're all extremely white and no its not from the view>page color. neither has the office theme changed from black. how do you revert this back to all black pages?
Is it possible you are looking to put the OneNote desktop application to dark mode? https://support.office.com/en-us/article/turn-dark-mode-on-or-off-in-onenote-bb81fb88-968d-4c1a-818d...