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Re: color specification in Cascading Style Sheets

From: Chris Lilley <Chris.Lilley@sophia.inria.fr>
Date: Mon, 8 Dec 1997 19:00:09 +0100 (MET)
Message-Id: <9712081900.ZM21132@grommit.inria.fr>
To: Blair MacIntyre <bm@cs.columbia.edu>, www-style@w3.org
On Dec 6,  5:34pm, Blair MacIntyre wrote:

> I've recently read the color part of the CSS specification.


> While I'm very happy that you are specifying colors in sRGB, so that we
> may start to expect some sort of uniformity across displays, I am dismayed
> to see that only an RGB notation is going to be supported.


> While RGB is convenient for machines, and often useful for people who have
> become accustomed to it, in many situations, either the HSV or (even
> better) HSL notations are more useful. Both of these notations are simple
> transformations of the RGB color space, but represent more intuitive
> spaces

I urge you to read the archives of this mailing list [1] for previous
discussions about the non-intuitive nature of HSL  (and HSV).

> - selecting a range of similar colors, for shadows or highlighting.
>   Using these spaces, we simply change the value/lightness or saturation,
>   but keep the hue the same.

The corresponding activity, of changing the hue but keeping the lightness
the same, does not give the intuitively expected results using HSL.

[1] http://lists.w3.org/Archives/Public/www-style/1997Dec/

Chris Lilley, W3C                          [ http://www.w3.org/ ]
Graphics and Fonts Guy            The World Wide Web Consortium
http://www.w3.org/people/chris/              INRIA,  Projet W3C
chris@w3.org                       2004 Rt des Lucioles / BP 93
+33 (0)4 93 65 79 87       06902 Sophia Antipolis Cedex, France
Received on Monday, 8 December 1997 13:01:08 UTC

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