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From: Michael <m@m.com>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Color definition in eps terminal
Date: Tue, 27 Sep 2011 00:17:52 +0700
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Hello

I need to plot on my graph number of curves with different colors (this 
is done with the script) and the tolerance limits with an explicitly 
defined color (e.g. lightgray) and linestyle (dashed). Terminal is eps.

Can I explicitly define the color without editing prologue.ps?