[csswg-drafts] [css-color-hdr] How to account for HDR in the cascade when UAs "limit the maximum luminance at a user option. (#11790)

cookiecrook has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-color-hdr] How to account for HDR in the cascade when UAs "limit the maximum luminance at a user option. ==
Accessibility section of the CSS COLOR HDR spec says:

> Some individuals may have a sensitivity to very bright colors, so user agents should provide a mechanism to limit the maximum luminance at user option. 

Cite: https://www.w3.org/TR/css-color-hdr-1/#a11y

Apple's [Reduce White Point](https://support.apple.com/en-gb/guide/iphone/iph3e2e1fb0/ios) is an accessibility feature for users experiencing light-sensitivity; often a comorbidity of low vision.

My question is how should this (or other ) be implemented to work within the context of HDR images and video? I heard some [proposals about adding an user agent style sheet property](https://www.w3.org/2025/02/26-css-minutes.html#10f9) (or using [dynamic-range-limit](https://www.w3.org/TR/css-color-hdr-1/#propdef-dynamic-range-limit)?) to enable HDR by default, but allow authors (or an UA/AT feature like Reduce White Point) to override the default value.

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/11790 using your GitHub account


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Received on Wednesday, 26 February 2025 21:09:46 UTC