The spec is probably too young, but this is really useful to have, especially the color adjustment functions that are really useful with CSS variables. Spec : http://dev.w3.org/csswg/css-color-4/
Scoping this bug down to just the color() function, as we'll want to make individual decisions about different parts of the spec.
Apparently WebKit recently added support for color() syntax, and it will probably available in STP 18, around the end of November. https://twitter.com/grorgwork/status/796809159119253505
I can take a look at this color() functions. (I think Bug 1352754 is the same as this one.)
(In reply to Boris Chiou [:boris] from comment #3) > I can take a look at this color() functions. (I think Bug 1352754 is the > same as this one.) But I need to finish stylo CSS transition first, so please feel free to take this before I start to work.