A family of Microsoft word processing software products for creating web, email, and print documents.
The article content re Dark Mode is accurate. The feature is globally controlled in System Preferences but can be managed within the Preferences of individual documents.
It's just the allusion to Colorful/Classic for window coloring no longer is valid. Note that there is no instruction on how to go about applying either of them because the Preference no longer exists. I have no idea why that part of the article content even remains.
Quite frankly IMO that entire article needs to be taken down & replaced. Note also that it explicitly states:
This feature is available only to Microsoft 365 Subscribersfor Windows desktop clients.
then goes on to provide illustrated direction on how to manage Dark Mode on a Mac.
This is just one example. There are other articles which are just as self-contradictory & impertinent. It's especially frustrating when accessing Help from within a Mac Office program... the user typically is presented with hits which pertain strictly to the Windows product. I realize that Microsoft claims to be striving for parity on the 2 platforms but apparently nobody has told them that they aren't there yet. Small wonder that users are confused & bewildered - the developer can't even get it right.