Computer monitor is suddenly gray scale instead of color?

[Jonathan S.]

I must be missing something obvious here, but so far I'm utterly baffled: my computer monitor has suddenly gone gray scale on me!?!

Same with both the laptop screen and an external display.

Yet on start-up, the password screen is color as always: but as soon as I enter my password and enter Windows, all is gray scale.

I've looked at the Windows 10 Settings for Display and Personalization, yet nothing seems wrong there.

Trend Micro gives me a clean bill of health.

To make this even more frustrating, after I finish up some "real" work today I had been planning to revise some of the course maps for my skimo races:
http://nerandorace.blogspot.com
... so as to finish up my U.S. skimo ass'n sanctioning applications, but the color-coding is essential, arghh!

Thanks in advance for any feedback, whether practical solutions to fix the problem or just entertaining commentary so I can at least get some amusement value out of this situation!

[anotherVTskibum]

What about your color profiles settings? Is it possible you managed to switch the display into a greyscale colorspace / ICC profile somehow?

Or did you enable Color Filter Mode? (c.f. https://paulrobichaux.com/2017/10/06...r-filter-mode/)

[Jonathan S.]

What about your color profiles settings? Is it possible you managed to switch the display into a greyscale colorspace / ICC profile somehow?

Or did you enable Color Filter Mode? (c.f. https://paulrobichaux.com/2017/10/06...r-filter-mode/)

^ Wow, thanks -- all fixed now!

And this explanation:

For ease of use, Microsoft tied it to a key combination: the Windows key + Ctrl + C. I must have accidentally bumped the Windows key while copying my quote.

... sounds especially likely, since it happened in the middle of copying a lot of text back-and-forth from SkiReg.com pages for four similar races, and also sending out similar emails to the different venues for course marking.
Okay, now to design a Berkshire East course that will be easy to follow yet provide even more challenge than last year's suffer fest!
[insert maniacal chortle here]