How to give colour as parameter to ghostscript

From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.postscript
Subject	How to give colour as parameter to ghostscript
Organization	Decebal Computing
Date	2014-03-31 13:24 +0200
Message-ID	<87y4zqsj9a.fsf@Equus.Decebal.nl> (permalink)

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I have defined the following:
    /colors <<
      .
      .
      .
      /colorNavy                { 0      0      0.5  }
      /colorNavyBlue            { 0.14   0.14   0.56 }
      /colorNeonBlue            { 0.3    0.3    1    }
      .
      .
      .
      /colorOrange              { 1      0.5    0    } % coral
      /colorOrangeRed           { 1      0.14   0    }
      .
      .
      .
      /colorRed                 { 1      0      0    }
      .
      .
      .
      /colorWhite               { 1      1      1    }
      /colorYellow              { 1      1      0    }
      /colorYellowGreen         { 0.6    0.8    0.2  }
    >> def
    colors begin

Normally I do something like the following:
    /backgroundColor  {colorYellow} def

But I want to give the colour as a parameter to ghostscript:
    -sbackgroundColor=colorNavy

What do I need to do in the postscript script to get the right value
in backgroundColor?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Thread

How to give colour as parameter to ghostscript Cecil Westerhof <Cecil@decebal.nl> - 2014-03-31 13:24 +0200
  Re: How to give colour as parameter to ghostscript ken <ken@spamcop.net> - 2014-03-31 14:00 +0100
  Re: How to give colour as parameter to ghostscript Cecil Westerhof <Cecil@decebal.nl> - 2014-03-31 14:47 +0200

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