[css-color-5] Consider allowing multiple color-adjusters to be used in color-adjust()

[weinig]

In the current CSS Color 5 draft's color-adjust() function, https://drafts.csswg.org/css-color-5/#coloradjust, only 0 or 1 color-adjusters are allowed per the grammar. While clearly one could nest color-adjust() calls, it seems like it would be more consistent with color-mix() to allow multiple adjusters (within the picked colorspace).

[LeaVerou]

Note that if we allow multiple adjusters we'd need to resolve these against color-adjust(): #6045 #6048

Though an easy way out would be to define multiple adjusters as sugar over nested color-adjust() calls.

[argyleink]

Can the HTTParchive data help us here? see how often there's multiple adjustments?
or, I do like the idea of shipping the feature, that requires nesting for multiple adjustments, now and adding sugar later.

[svgeesus]

Closed by WG resolution to drop color-adjust()