W3C home > Mailing lists > Public > www-style@w3.org > December 1997

Re: Cascading Style Sheets

From: Chris Lilley <Chris.Lilley@sophia.inria.fr>
Date: Mon, 1 Dec 1997 23:28:04 +0100 (MET)
Message-Id: <9712012328.ZM13589@grommit.inria.fr>
To: Clive Bruton <clive@typonaut.demon.co.uk>, <www-style@w3.org>
On Dec 1,  9:44pm, Clive Bruton wrote:

> >L*A*B color is supposed to show every shade of color you can think of, but
> >does it really do any good? RGB can show more colors than CMYK can, but
> >there shades that CMYK is capable of but not RGB.
> There are?


> I guess it's possible that there are, but I've always thought the
> opposite,

neither gamut is a proper subset of the other.

>  and even if there were you couldn't see them anyway, since you
> see in RGB.

No you don't. ;-)

For the visually oriented such as myself - an RGB gamut is triangular;
a CMYK gamut is an irregular rough hexagon which doesn't cover the corners
of the triangle but pokes out a bit round the middle of each side of the
triangle. The human visual gamut is a tongue shaped thing with a flat
base, and completely covers both the tiangle, the hexagon, and a bunch
of space not covered by either.

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, 1 December 1997 17:28:33 UTC

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