It works in "Gnome Web", which is mostly a wrapper around WebKit. > Support for this feature first shipped in March 2021, in Safari Technology Preview 122. ht

It works in "Gnome Web", which is mostly a wrapper around WebKit. > Support for this feature first shipped in March 2021, in Safari Technology Preview 122. https://webkit.org/blog/11577/release-notes-for-safari-technology-preview-122/ https://webkit.org/blog/11577/release-notes-for-safari-techn... > Added experimental support for CSS Color 5 color-contrast() https://trac.webkit.org/changeset/273683/webkit/ https://trac.webkit.org/changeset/273683/webkit/