I couldn't find the option to enable it on Adobe Reader or Foxit Reader. I don't think Sumatra has it neither. Can someone help me? White pages are starting to hurt my eyes.
Tools -> Preferences -> Documents -> Document Colors Options
If someone's still looking for the option in sumatra, go to Settings -> Advanced options and change the following lines
FixedPageUI [ TextColor = #000000(make this #ffffff) BackgroundColor = #ffffff(make this #000000) SelectionColor = #f5fc0c WindowMargin = 2 4 2 4 PageSpacing = 4 4 ]