Strange blue suddenly appearing in place of an off-white

Hi, All. I am having this occasional, but time-intensive issue where one of my colors will suddenly turn a random bright color. Last night, the BG color on all of my pages turned from an off-white (#faf8f0) to this vibrant blue. I restarted my laptop, uninstalled ID and reinstalled it, tweaked the color settings and even tried a prior version of ID. Nothing seemed to fully work. Someties, when I adjusted the color settings, the color on some of my pages would change back to the normal color, but not on all. Also, this wasn't just an ID glitch because the PDF would export in this bright blue as well.

After letting my laptop sit overnight, the issue is now resolved. Since this has come up a couple of times and resulted in missed deadlines, I am eager to get to the bottom of it. Thanks for any help you can provide!

***I am including a screen cap of the issue in action as well as my color picker, which still reflects the previous blue color.