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Re: [css-color] wider/deeper colors

From: Chris Lilley <chris@w3.org>
Date: Tue, 16 Feb 2016 10:03:51 +0100
Message-ID: <1548724711.20160216100351@w3.org>
To: aaron.www-style-@infinite-source.de, www-style@w3.org
Hello aaron,

Monday, February 15, 2016, 11:42:02 PM, you wrote:

> Something that would benefit from alternative colorspaces even without
> wider display gamut are CSS gradients.

> Currently they're done in sRGB which leads to some fairly ugly results
> when blending hues[1].

> David Baron suggested[2] that extending SVG's color-interpolation
> property to cover gradients might help.

It would help, yes. (Actually not an extension, in SVG it already does
that, but applying the property to html/css would help there).

> The downside tehre is that the only offered alternative, linear sRGB,
> would fix the hue issue it would do so at expense of luminosity
> transitions, e.g. in grey-grey gradients.

Yes, just those two options is too limited.

> Ideally blending in some perceptually uniform space would be an option
> since it likely reflects author intent.

Since we are adding Lab as a colorspace, then adding it as a value to
color-interpolation makes a lot of sense too. Perceptually linear, no
gamut clipping.

> Similarly gradients could benefit from deeper colors even on 8bit
> displays simply by dithering the output to 8bit.

Yes (as is done currently with 8bit colors, dithered to 6bits on TN
displays).



-- 
Best regards,
 Chris  Lilley
 Technical Director, W3C Interaction Domain
Received on Tuesday, 16 February 2016 09:03:58 UTC

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