NEW216795
System color 'canvas' cannot be set or read 
https://bugs.webkit.org/show_bug.cgi?id=216795
Summary System color 'canvas' cannot be set or read
Дилян Палаузов
Reported 2020-09-21 12:10:17 PDT
The way to obtain the default background color set by the user, is to call function getDefaultBackgroundColor() { let div = document.createElement("div"); div.style.backgroundColor = "canvas"; document.documentElement.appendChild(div); let color = getComputedStyle(div).backgroundColor; div.remove(); return color; } This does not work with WebKitGTK 2.28.1/Epiphany 3.36.4. In particular it allows setting custom CSS, and body.background-color in it, but it is unclear how to use the Canvas keyword as calor there. • How to configure WebKit to change the default canvas system colour, in terms of https://www.w3.org/TR/css-color-4/#css-system-colors • Please make the snippet above work. See also https://bugzilla.mozilla.org/show_bug.cgi?id=1666127 and https://gitlab.gnome.org/GNOME/epiphany/-/issues/1344
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Emilio Cobos Álvarez (:emilio)
Comment 1 2020-09-21 12:17:01 PDT
Ideally WebKit would support color: canvas and would allow users to change it, otherwise you need to use user stylesheets which don't reliably work.
Radar WebKit Bug Importer
Comment 2 2020-09-22 15:56:27 PDT
<rdar://problem/69397317>
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