It's an HDR image, I think.[0] At the moment, only some browsers show it as brighter—Firefox on macOS, for example, doesn't support HDR images and I had to open the page in Safari to see it for myself.
It's an 8-bit PNG of a magenta patch (with a dash of white), but the ICC profile is set to Rec.2020 PQ. So I think the high 255 values of 8-bit magenta/white will get mapped to very top of the PQ curve, which is like 10,000 nits (or whatever brightness your display can muster)
How the hell does this look like it is burning a hole in my screen?
https://pbs.twimg.com/profile_images/1998201848008679424/OGH...
It's an HDR image, I think.[0] At the moment, only some browsers show it as brighter—Firefox on macOS, for example, doesn't support HDR images and I had to open the page in Safari to see it for myself.
[0] see, for example, this submission from the front page a month ago: https://news.ycombinator.com/item?id=49402521.
It's an 8-bit PNG of a magenta patch (with a dash of white), but the ICC profile is set to Rec.2020 PQ. So I think the high 255 values of 8-bit magenta/white will get mapped to very top of the PQ curve, which is like 10,000 nits (or whatever brightness your display can muster)