Re: [css-colors] Specify the System Colors colors

On Friday 2013-08-30 12:35 +0200, Simon Pieters wrote:
> [[
> User agents must support these keywords, but should map them to
> "default" values, not based on the user's OS settings (for example,
> mapping all the "background" colors to white and "foreground" colors
> to black).
> ]]
> -- http://tabatkins.github.io/specs/css-color/Overview.html#system-colors

I tend to think this "should" isn't a good idea.

For a start, the system colors are still needed along with
'appearance', given the way appearance is actually (interoperably, I
think) implemented.  (Was the disagreement between the
likely-interoperable implementations and the spec part of why it got
dropped from css-ui, post CR?)

I don't think Gecko would be able to honor this should, both because
we need the correct values in our UA style sheets and because we
need them in our UI.

(That said, Gecko also has a number of longstanding prefixed
extensions to address issues such as those raised in
http://lists.w3.org/Archives/Public/www-archive/2013Aug/0027.html
The working group removed these additions from the spec, I believe
because it wanted to deprecate the entire set.)

> Using just black and white seems unnecessarily boring. It's also not
> so clear which ones are backgrounds and which are foregrounds.

There's a clear separation between foregrounds, backgrounds, and
borders.

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                          https://www.mozilla.org/   𝄂
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