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

> @facelessuser FWIW I did create a Scale LH variation that does better with preserving lightness by doing a second pass with only setting L, but it did worse in terms of overall ΔΕ2000. If we don't think ΔΕ2000 is a good measure we can pick a different one, but I think it will be hard to develop a good algorithm without consensus on what overall scoring to use.

@LeaVerou  ∆E2000 in what regards? From the original color? That just means it may have had to reduce chroma more in order to preserve the lightness. But I think I may understand now how ∆E2000 is being used as a metric now. I just don't know if in this sense it is saying the color is visually more appropriate, only that the color that is found is closer to the original. When you are talking about a distance of 18 vs 35, 18 is already so far away I don't think it means the same thing anymore. The difference in both cases now is very noticeable to the eye. The question now becomes whether the color properties that are not retained are more visually tolerable for the given case. 

Anyway, if it is good enough for the use case, then it may not matter. As shown in my example earlier, darker gradients have some inconsistencies with Scale LH, but maybe that isn't an issue?

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Received on Friday, 16 February 2024 18:53:39 UTC