Make images render brighter than white by abusing Rec.2100 PQ profiles
The idea behind images that glow brighter than white on LinkedIn: HDR headroom, embedded color signals, and where the trick survives.
Make images render brighter than white by abusing Rec.2100 PQ profiles launched on July 11, 2026 with 5 votes, #4,557 of 24,623 launches that month and more than 75% of that year's launches.
What it does
You may have seen posts on LinkedIn or Instagram where the image seems to glow — visibly brighter than the white page around it. It looks like it breaks the rules of the screen. It doesn't. It exploits a real, documented gap between what "white" means in SDR and what modern displays can actually output. A normal image tops out at signal value 255 — "white." Your operating system maps that to a comfortable reference level, roughly 200 nits. But an HDR-capable panel (recent MacBook Pro, iPhone, Pixel, most OLED TVs) can physically output 1,000–1,600 nits. The gap between reference white and panel peak is headroom — Apple calls its implementation EDR. It's reserved for HDR content: video…from superwhite.app
Does a similar job
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Make your logo extra bright on HDR screensAug 2026 · soverybright.com · ▲81Certain logos started standing out to me on LinkedIn as brighter/whiter than everything else around them. I dug in and found out this is accomplished by adding a gain-map to an existing JPEG, visible only on HDR screens like a newer MacBook Pro. LinkedIn is the only social network I've found that isn't stripping them out, but of course you serve them up on your own site. I worked with Claude Code to turn it into a little browser-based utility (no registration) and hope you find it useful!
Dual Shades2025 · dual-shades.anmolagrawal.dev · ▲116Keep your subject in color, fade the background to B&W
HiColor — convert images to retro 15/16-bit RGB color with dithering2021 · github.com · ▲64🎨 Convert images to 15/16-bit RGB color with dithering - dbohdan/hicolor
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