[Troubleshooting] Screen Black & White, Help?

[Pvfreis]

So, yesterday out of nowhere my monitor just started showing everything black and white, at first I thought it might be a problem with my monitor, but after restarting I realized everything else (BIOS screen, lock screen, startup windows logo) still appears in color.

I've tried changing color settings on NVIDIA Control Panel, rolling back drivers, but nothing seems to work.
Any settings I'm missing? Or any way to just default some setting that I might have accidentally fucked?

I'm running windows 10, my GPU is a pretty old Zotac Geforce 660 Ti

[ProjectBox153]

What cable are you using to connect the monitor? Can you try a different cable and/or monitor?

[Pvfreis]

I have two monitors, one connected over VGA and one on HDMI, both appear the same. Taking a screenshot and viewing it on another computer shows that it's actually rendering in B&W. Also switching over to another windows user seems to fix it, so it must be some windows setting I'm missing.

[Pvfreis]

Ok, I fixed it, apparently I applied a Grayscale color filter, found it under the high contrast settings. Not sure how it happened, but probably some sort of weird key combination triggered it.