I am on my 30 days trial period and went into WB 10 Settings/Per application. I first rendered the style Dark Mode by Vad_M but didn't like the visual effect on the grid area of MS Excel 2016 so, I added an exclusion for EXCEL.exe. This, unfortunately, didn't manage to restore the original worksheet background to the standard 'transparent white' color.
Other Office apps have the standard white background even when using the official MS Office 'Dark Mode' (see printscreen 3-4) while, it seems that the Excel grid area had been "skinned" with the main color of the Dark theme and can't be rolled back or excluded.
Can you help me troubleshooting the issue? I can't even see the WB 10 icon in the Windows toolbar anymore so, I'm not able to unload the entire Dark mode theme from my Windows 10 OS.
# snapshot 1:
# snapshot 2 - Excel grid area
# snapshot 3:
# snapshot 4: