Publisher has suddenly decided CMYK 0,0,0,0 (RGB 255,255,255) is yellow instead of white!

[Philosoraptor - Jeff H]

In the course of trying to fix a seemingly unrelated issue, Publisher suddenly changed the default colour of a lot of text and fills from white to yellow. I did hit the Revert Defaults button (gear with red slash, below the Text and Table menus) in the course of my troubleshooting, but can't swear to whether the problem started before or after that. In any case, to my knowledge this shouldn't have changed any colours; for all the weird unexpected behaviours I've seen from this software before, nothing that I'd expect to be white has ever defaulted to yellow before.

The even weirder part is, I can't change it back because even when I explicitly set the fills to CMYK 0, 0, 0, 0 (or equivalently, RGB 255, 255, 255) it still interprets that as yellow instead of white!

In the screenshot below, you can see that this affects the right text frame, all the thumbnails in the Pages frame (but weirdly, not the pages themselves, except that one), the colours shown in the Text Frame window on the right, and even the text in the list of text styles, none of which was yellow before - it was all white as can be seen in my screenshots in a couple of other threads.

In addition, you can also see that I've manually changed the fill colour to what should be white, and it hasn't made a difference.

What could possibly be going on here?

PS - yes, I noticed (and have already fixed) the editing error in item 4 on the left :-).

[Philosoraptor - Jeff H]

Okay, the problem is probably that I installed a new monitor driver in the course of a routine Windows update 😆. The issue is the one detailed here and the steps there - basically, ditching the colour profile my monitor manufacturer would prefer and installing a generic one instead - have already fixed it. Thanks to anyone reading this who was about to point this out, but you needn't bother!