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CNS colors

From: Hakon Lie <howcome@w3.org>
Date: Fri, 2 Feb 1996 11:48:30 +0100
Message-Id: <199602021048.LAA09631@www4.inria.fr>
To: www-style@w3.org
Chris Lilley has brought to attention a color naming scheme that fits
neatly into CSS. CNS is described in [1]. The basic components of CNS
are:

 hues: red, orange, yellow, green, blue, purple, brown, white, gray,  black
 
 saturation: grayish, moderate, strong, vivid (vivid is default)

 lightness: very dark, dark, medium, light, very light (medium is default)

Some sample combinations:

  CNS syntax       Comments

  blue             (medium vivid blue)
  greenish blue    (one-quarter of the way from blue to green)
  blue-green       (halfway between blue and green)
  green-blue       (ditto)
  light blue       (light vivid blue)
  very dark green  (very dark vivid green)
  grayish green    (medium grayish green)

  etc. The CNS description includes a formal syntax. 

Integrated into CSS, one could say:

  BODY { background: light brown }
  H1 { color: dark green }

CNS is almost compatible with the current color naming scheme of
CSS1. 4 of the colors in the current list of CSS colors would be
expressed differently:

  CSS       CNS (my best guess)

  magenta   light red-blue
  cyan      light blue-green
  pink      light red
  violet    purple

Using CNS, one can express 627 separate color names, and the authors of
the paper claim to a high degree of accuracy in user studies.

In order to incorporate CNS into CSS we need some sample code for
convert to RGB, and to resolve the 'magenta' conflict. Before we go
ahead with this, what are people's reactions?

[1] T Berk, L Brownston, A Kaufman: A New Color-Naming System for
Graphis Languages, IEE CG&A, May 1982

-h&kon

Hakon W Lie, W3C/INRIA, Sophia-Antipolis, France
http://www.w3.org/People/howcome  howcome@w3.org
Received on Friday, 2 February 1996 05:50:54 GMT

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