[css-color-4] Color modifications proposal: extending color functions

[mozilla-apprentice]

Resolutions were made for csswg-drafts/#3187.

[css-color-4] Color modifications proposal: extending color functions

• RESOLVED: Put all the proposals into css-color-5, ChrisL and future Una as editors
• RESOLVED: Rename to put 'color' first, adjust-color -> color-mod()
• RESOLVED: Add color-contrast() without currentbg
• RESOLVED: Add color-mix(), try to align with cross-fade()
• RESOLVED: Put both color adjustment proposals into css-color-5, with keywords instead of css-color-5
• RESOLVED: Add Lea Verou as editor of css-color-5

Discussion.

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To file a bug automatically for these resolutions, add the bug label to the issue.

If no bug is needed, the issue can be closed.

[emilio]

We don't implement these yet, so I'm not sure it's useful to file a bug for this.

@heycam should we clarify whether we're expected to file bugs for new features we don't yet implement?