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<title>PyXPlot Users' Guide: The colors module</title>
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<b class="current">The <tt class="ttfamily">colors</tt> module</b>
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<div><h2 id="a0000000247">2.2 The <tt class="ttfamily">colors</tt> module</h2>
<p>The <tt class="ttfamily">colors</tt> module contains color objects representing all of Pyxplot’s default colors. It also contains the following functions: </p><p> <big class="large"><b class="bf">colors.spectrum(<img src="images/img-0301.png" alt="$spec,norm$" style="vertical-align:-4px;
width:85px;
height:12px" class="math gen" />)</b></big> <br />The colors.spectrum(<img src="images/img-0301.png" alt="$spec,norm$" style="vertical-align:-4px;
width:85px;
height:12px" class="math gen" />) function returns a color representation of the spectrum <img src="images/img-0302.png" alt="$spec$" style="vertical-align:-4px;
width:33px;
height:12px" class="math gen" />, normalised to brightness <img src="images/img-0299.png" alt="$norm$" style="vertical-align:0px;
width:44px;
height:8px" class="math gen" />. <img src="images/img-0302.png" alt="$spec$" style="vertical-align:-4px;
width:33px;
height:12px" class="math gen" /> should be a function object that takes a single input (wavelength) with units of length, and may return an output with arbitrary units. <a name="a0000001558" id="a0000001558"></a> </p><p> <big class="large"><b class="bf">colors.wavelength(<img src="images/img-0298.png" alt="$\lambda $" style="vertical-align:0px;
width:9px;
height:13px" class="math gen" />,<img src="images/img-0299.png" alt="$norm$" style="vertical-align:0px;
width:44px;
height:8px" class="math gen" />)</b></big> <br />The colors.wavelength(<img src="images/img-0298.png" alt="$\lambda $" style="vertical-align:0px;
width:9px;
height:13px" class="math gen" />,<img src="images/img-0299.png" alt="$norm$" style="vertical-align:0px;
width:44px;
height:8px" class="math gen" />) function returns a color representation of monochromatic light at wavelength <img src="images/img-0298.png" alt="$\lambda $" style="vertical-align:0px;
width:9px;
height:13px" class="math gen" />, normalised to brightness <img src="images/img-0299.png" alt="$norm$" style="vertical-align:0px;
width:44px;
height:8px" class="math gen" />. A value of <img src="images/img-0300.png" alt="$norm=1$" style="vertical-align:0px;
width:76px;
height:12px" class="math gen" /> is recommended for plotting the complete span of the electromagnetic spectrum without colors clipping to white. <a name="a0000001559" id="a0000001559"></a> </p></div>
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