Last year, Microsoft promised that it would add an HDR Calibration app to Windows 11, and this week it quietly delivered.
“Calibrate your HDR (high dynamic range) display for a better experience with HDR content on your Windows 11 PC,” the Microsoft Support website explains. “The Windows HDR Calibration app helps you improve color accuracy and consistency. It also lets you customize how vividly colors will appear for both HDR and SDR (standard dynamic range) content when HDR is turned on.”
With this app, you can use the three supplied test patterns to test the darkest visible details you can see, the brightest visible details, and the maximum brightness for your HDR-compatible display. It requires Windows 11, newer graphics chipsets, and, obviously, an HDR-compatible display. I believe it’s available only on x64 systems at this time (not Arm).
Thanks to Rafael for the tip.