Is my screen HDR?
We ask the browser whether the display reports high dynamic range via the CSS dynamic-range media feature.
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HDR
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FAQ
High dynamic range displays can show a wider brightness and contrast range than standard dynamic range.
We use matchMedia('(dynamic-range: high)'). Support and accuracy vary by browser and OS.
HDR may be off in OS settings, the browser may not expose the feature, or the window may be on an SDR display.
Not exactly. OS and app support for HDR video can differ from what CSS media queries report.
No. Sites can detect preference hints; enabling HDR is controlled by your system and display.