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<title>GrADS Command: set rgb</title>
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<h2><b>set rgb</b></h2>
<p>
This command allows the user to define a new color within GrADS. The syntax is:
<p>
<code>set rgb <i>color# R G B</i></code>
<p>
where:
<ul>
<code><i>color#</i> </code>is the color number; it can range from 16 to 99 <span class="style1">(or 255 -- see Usage Note #1) </span><br>
<code><i>R</i> </code> is the Red value (0-255) <br>
<code><i>G</i> </code> is the Green value (0-255) <br>
<code><i>B</i> </code> is the Blue value 0-255) </br>
</ul>
<p>
The new color is referred to by its <code><i>color#</i></code>
in any GrADS command that allows specification of colors.
<p>
<h3>Usage Notes</h3>
<ol>
<li>The <code><i>color#</i></code> must be a value between <code>16</code> and <code>99</code> -- <a href="16colors.html"><code>0</code> to <code>15</code> are
predefined</a>.
<br>
<span class="style1">As of GrADS version 2.0.a6, the maximum number
of colors increased from 99 to 255.<br>
<br>
</span>
<li>The GrADS metafile-to-postscript translator <a
href="gradutilgxps.html"><code>gxps</code></a> will make use of any
new color settings although the output colors will be
printer-dependent and should be checked for the desired
rendering. When converting new color settings into grayscales, <a
href="gradutilgxps.html"><code>gxps</code></a> will translate the
GREEN intensity ONLY into a new greyscale value. Note that <a
href="gradutilgxps.html"><code>gxps</code></a> does have a predefined
mapping between color values from 0 to 15 such that the <a
href="16colors.html">predefined rainbow sequence</a> is rendered into a
fairly pleasing greyscale gradation; this cannot be done for newly
defined colors.<br>
<br>
<li>For more details on using defined colors, see the section in the
User's Guide on <a href="colorcontrol.html">controlling colors in
GrADS</a>.
</ol>
<p>
<h3>Examples</h3>
<P>
<code>set rgb 50 200 200 200 </code>
<p>
Defines a new color number, <code>50</code>, and
assign a color to it. In this case, the color would be a light gray.
<p>
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