[mmh0000]

It did the same thing to my monitor, which is NOT the program's fault. That's terrible hardware/hardware design if software can break it forever, especially if a webpage can do it... Someone could be so malicious with that.

My monitor has a built-in "LCD conditioning" thing, which just slowly flips through various solid color screens. That "fixed" it. I suspect a YouTube video doing the same would also work.

[voltaireodactyl]

I had a weird app do this to my screen, and a 4K YouTube video of just that appeared to fix it fairly quickly.