Re: [csswg-drafts] [css-color-4] Channel clipping breaks author expectations, especially when using 'perceptually uniform' spaces (#9449)

I think the ball's in the WG's court to pick an algorithm to map from the device-independent (non-RGB) spaces to Rec.2020 (or a '"nicer-shaped" surface very close to the Rec2020 gamut'). Chris C opened #10579 to help that happen, but there's been no progress on that issue, aside from Chris C saying he's happy with all the options that have been proposed in that issue. Once the WG settles on an algorithm, it looks like Chris C is happy to implement it, given the permission to then clip from Rec.2020 to the user's display.

I see some discussion after https://github.com/w3c/csswg-drafts/issues/9449#issuecomment-2162711081 that questions the [resolution](https://github.com/w3c/csswg-drafts/issues/9449#issuecomment-2162711081) to allow clipping from Rec.2020 to the user's display. My understanding is that this level of implementation freedom is a hard requirement from all of the browser engines, and that if folks want to fix the problem for wildly out-of-gamut colors, they should focus on the part that Chris C has expressed flexibility on.

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Received on Wednesday, 4 June 2025 22:20:49 UTC