Dark Mode as simple and easy just like outlook!
Outlook has that button to instantly switch backgrounds to match dark mode and it is extremely helpful when working at night. The bright white excel workbook makes it painful to use at night.
I suggest merging with this idea, as both have quite a few votes: https://excel.uservoice.com/forums/304933-excel-for-mac/suggestions/34080973--night-version
Interestingly, this idea was originally suggested 2.5 years ago and still hasn't been implemented. Excel developers, please consider implementing this feature to save user's eyes! The suggested workarounds mentioned in the original idea are not enough.