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The Color Naming System (CNS) is a systematic notation for named colors for computer applications using
CNS uses ten color names, three of which (''black, white, gray'') are special, and has them combined or prefixed with several modifiers.
The system expressed in
named-color := gray-color , chromatic-color
gray-color := 'black' , 'white' , lightness gray
gray := 'gray' , 'grey'
chromatic-color := shade hue , saturation hue
tint := 'whitish' , 'pale' , 'brilliant' , 'vivid'
shade := 'blackish' , 'dim' , 'deep' , 'vivid'
saturation := 'grayish' , 'moderate' , 'strong' , 'vivid'
lightness := 'moderate' , 'very'? 'light' hue := splash-color? base-color , base-color '-' base-color
base-color := 'red' , 'orange' , 'brown' , 'yellow' , 'green' , 'blue' , 'purple'
splash-color := 'reddish' , 'orangish' , 'brownish' , 'yellowish' , 'greenish' , 'bluish' , 'purplish'
color := , lightness , , transparencyhue
saturation := absolute saturation-value , saturation-value relative
saturation-value := 'dull' , 'bright'
lightness := absolute lightness-value , lightness-value relative
lightness-value := 'dark' , 'light'
absolute := odifier '-'
modifier := 'extra' , 'semi'
relative := 'er'
transparency := semi-' opacity-value
opacity-value := 'opaque' , 'transparent'
hue := prime , general , special
prime := 'red' , 'green' , 'blue' , 'cyan' , 'magenta' , 'yellow' , 'white' , 'black'
general := 'navy' , 'lime' , 'teal' , 'aqua' , 'maroon' , 'purple' , 'fuchsia' , 'olive' , 'gray' , 'silver'
special := extra , composite ; composite ≈ prime '-' prime
extra := 'pink' , 'brown' , 'tan' , 'orange'
composite := 'yellow-green' , 'green-cyan' , 'cyan-blue' , 'blue-magenta' , 'magenta-red' , …
English
English usually refers to:
* English language
* English people
English may also refer to:
Peoples, culture, and language
* ''English'', an adjective for something of, from, or related to England
** English national ide ...
terms created by Berk et al. in 1982.
System
CNS uses ten color names, three of which (''black, white, gray'') are special, and has them combined or prefixed with several modifiers.
The system expressed in Backus–Naur form
In computer science, Backus–Naur form () or Backus normal form (BNF) is a metasyntax notation for context-free grammars, often used to describe the syntax of languages used in computing, such as computer programming languages, document formats ...
looks something like this:.
Derivations
There have been variations of the CNS proposed for inclusion intoCSS
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or XML (including XML dialects such as SVG, MathML or XHTML). CSS is a cornerstone techno ...
that are more compatible with existing schemes.{{cite web, url=http://lists.w3.org/Archives/Public/www-style/2002May/0201.html, author=Benjamin D. Gray, date=May 2002, title=New CSS3 Color Names
See also
ISCC-NBS System - a competing color naming systemReferences