Bug 211933 – CSS color function should allow fallback color

• Status: RESOLVED
• Resolution: WONTFIX
• Component: CSS

[Nikita Vasilyev]

color: color(display-p3 1 0 0, green)

This should show red when display-p3 is supported, and green when it isn't. Instead it shows black.

data:text/html;,<body%20style="color:color(display-p3%200%201%200,%20green)">color</body>

---

https://www.w3.org/TR/css-color-4/#color-function

10.1. Specifying profiled colors: the color() function

The color() function allows a color to be specified in a particular colorspace (rather than the implicit sRGB colorspace that the other color functions operate in). Its syntax is:

color() = color( [ <ident>? [ <number>+ | <string> ] [ / <alpha-value> ]? ]# , <color>? )
The color function takes one or more comma-separated arguments, with each argument specifying a color, and later colors acting as "fallback" if an earlier color can’t be displayed (for example, if the colorspace it specifies hasn’t been loaded yet).

[Radar WebKit Bug Importer]

<rdar://problem/63248585>

[Devin Rousso]

Created attachment 399462 [details]
[Patch] WIP

Needs tests, but I think I have it working :)

[Sam Weinig]

Fallback colors have been removed from the spec.