- From: Mark Rogers via GitHub <sysbot+gh@w3.org>
- Date: Sat, 23 Oct 2021 18:26:00 +0000
- To: public-css-archive@w3.org
dd8 has just created a new issue for https://github.com/w3c/csswg-drafts: == Are a and b in lab( 0%, a, b ) really powerless? [css-color-4] == > If the lightness of a Lab color is 0%, both the a and b components are powerless https://drafts.csswg.org/css-color-4/#specifying-lab-lch Is this true, or is this implementation dependent when the Lab color is mapped to the display color space. `lab( 0%, -100, 100 )` produces an out of gamut sRGB color, which is mapped to a dark color (but not the same dark color) when converted using various convertors: http://www.brucelindbloom.com/iPhone/ColorConv.html http://colorizer.org/ https://rufflewind.com/_urandom/colorpicker/ color.js does map `lab( 0%, -100, 100 )` to `rgb(0,0,0)` Assuming gamut mapping is defined for CSS (https://github.com/w3c/csswg-drafts/issues/5191) won't there still be an implementation dependency if conversion uses ICC profiles? They don't guarantee identical results for out of gamut colors: https://drafts.csswg.org/css-color-4/#oklab-lab-to-predefined Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/6758 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Saturday, 23 October 2021 18:26:01 UTC