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<li><a class="reference internal" href="#"><code class="docutils literal notranslate"><span class="pre">matplotlib.colors</span></code></a><ul>
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<div class="section" id="matplotlib-colors">
<h1><code class="docutils literal notranslate"><span class="pre">matplotlib.colors</span></code><a class="headerlink" href="#matplotlib-colors" title="Permalink to this headline">¶</a></h1>
<p>The Color <a class="reference internal" href="../tutorials/index.html#tutorials-colors"><span class="std std-ref">tutorials</span></a> and <a class="reference internal" href="../gallery/index.html#color-examples"><span class="std std-ref">examples</span></a> demonstrate how to set colors and colormaps.</p>
<span class="target" id="module-matplotlib.colors"></span><p>A module for converting numbers or color arguments to <em>RGB</em> or <em>RGBA</em>.</p>
<p><em>RGB</em> and <em>RGBA</em> are sequences of, respectively, 3 or 4 floats in the
range 0-1.</p>
<p>This module includes functions and classes for color specification conversions,
and for mapping numbers to colors in a 1-D array of colors called a colormap.</p>
<p>Mapping data onto colors using a colormap typically involves two steps: a data
array is first mapped onto the range 0-1 using a subclass of <a class="reference internal" href="_as_gen/matplotlib.colors.Normalize.html#matplotlib.colors.Normalize" title="matplotlib.colors.Normalize"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Normalize</span></code></a>,
then this number is mapped to a color using a subclass of <a class="reference internal" href="_as_gen/matplotlib.colors.Colormap.html#matplotlib.colors.Colormap" title="matplotlib.colors.Colormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Colormap</span></code></a>. Two
sublasses of <a class="reference internal" href="_as_gen/matplotlib.colors.Colormap.html#matplotlib.colors.Colormap" title="matplotlib.colors.Colormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Colormap</span></code></a> provided here: <a class="reference internal" href="_as_gen/matplotlib.colors.LinearSegmentedColormap.html#matplotlib.colors.LinearSegmentedColormap" title="matplotlib.colors.LinearSegmentedColormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LinearSegmentedColormap</span></code></a>, which uses
piecewise-linear interpolation to define colormaps, and <a class="reference internal" href="_as_gen/matplotlib.colors.ListedColormap.html#matplotlib.colors.ListedColormap" title="matplotlib.colors.ListedColormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ListedColormap</span></code></a>, which
makes a colormap from a list of colors.</p>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<p><a class="reference internal" href="../tutorials/colors/colormap-manipulation.html"><span class="doc">Creating Colormaps in Matplotlib</span></a> for examples of how to
make colormaps and</p>
<p><a class="reference internal" href="../tutorials/colors/colormaps.html"><span class="doc">Choosing Colormaps in Matplotlib</span></a> for a list of built-in colormaps.</p>
<p><a class="reference internal" href="../tutorials/colors/colormapnorms.html"><span class="doc">Colormap Normalization</span></a> for more details about data
normalization</p>
<p class="last">More colormaps are available at <a class="reference external" href="https://jiffyclub.github.io/palettable/">palettable</a>.</p>
</div>
<p>The module also provides functions for checking whether an object can be
interpreted as a color (<a class="reference internal" href="_as_gen/matplotlib.colors.is_color_like.html#matplotlib.colors.is_color_like" title="matplotlib.colors.is_color_like"><code class="xref py py-obj docutils literal notranslate"><span class="pre">is_color_like</span></code></a>), for converting such an object
to an RGBA tuple (<a class="reference internal" href="_as_gen/matplotlib.colors.to_rgba.html#matplotlib.colors.to_rgba" title="matplotlib.colors.to_rgba"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_rgba</span></code></a>) or to an HTML-like hex string in the
"#rrggbb" format (<a class="reference internal" href="_as_gen/matplotlib.colors.to_hex.html#matplotlib.colors.to_hex" title="matplotlib.colors.to_hex"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_hex</span></code></a>), and a sequence of colors to an (n, 4)
RGBA array (<a class="reference internal" href="_as_gen/matplotlib.colors.to_rgba_array.html#matplotlib.colors.to_rgba_array" title="matplotlib.colors.to_rgba_array"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_rgba_array</span></code></a>). Caching is used for efficiency.</p>
<p>Matplotlib recognizes the following formats to specify a color:</p>
<ul class="simple">
<li>an RGB or RGBA (red, green, blue, alpha) tuple of float values in closed
interval <code class="docutils literal notranslate"><span class="pre">[0,</span> <span class="pre">1]</span></code> (e.g., <code class="docutils literal notranslate"><span class="pre">(0.1,</span> <span class="pre">0.2,</span> <span class="pre">0.5)</span></code> or <code class="docutils literal notranslate"><span class="pre">(0.1,</span> <span class="pre">0.2,</span> <span class="pre">0.5,</span> <span class="pre">0.3)</span></code>);</li>
<li>a hex RGB or RGBA string (e.g., <code class="docutils literal notranslate"><span class="pre">'#0f0f0f'</span></code> or <code class="docutils literal notranslate"><span class="pre">'#0f0f0f80'</span></code>;
case-insensitive);</li>
<li>a shorthand hex RGB or RGBA string, equivalent to the hex RGB or RGBA
string obtained by duplicating each character, (e.g., <code class="docutils literal notranslate"><span class="pre">'#abc'</span></code>, equivalent
to <code class="docutils literal notranslate"><span class="pre">'#aabbcc'</span></code>, or <code class="docutils literal notranslate"><span class="pre">'#abcd'</span></code>, equivalent to <code class="docutils literal notranslate"><span class="pre">'#aabbccdd'</span></code>;
case-insensitive);</li>
<li>a string representation of a float value in <code class="docutils literal notranslate"><span class="pre">[0,</span> <span class="pre">1]</span></code> inclusive for gray
level (e.g., <code class="docutils literal notranslate"><span class="pre">'0.5'</span></code>);</li>
<li>one of the characters <code class="docutils literal notranslate"><span class="pre">{'b',</span> <span class="pre">'g',</span> <span class="pre">'r',</span> <span class="pre">'c',</span> <span class="pre">'m',</span> <span class="pre">'y',</span> <span class="pre">'k',</span> <span class="pre">'w'}</span></code>, which
are short-hand notations for shades of blue, green, red, cyan, magenta,
yellow, black, and white. Note that the colors <code class="docutils literal notranslate"><span class="pre">'g',</span> <span class="pre">'c',</span> <span class="pre">'m',</span> <span class="pre">'y'</span></code> do not
coincide with the X11/CSS4 colors. Their particular shades were chosen for
better visibility of colored lines against typical backgrounds.</li>
<li>a X11/CSS4 color name (case-insensitive);</li>
<li>a name from the <a class="reference external" href="https://xkcd.com/color/rgb/">xkcd color survey</a>, prefixed with <code class="docutils literal notranslate"><span class="pre">'xkcd:'</span></code> (e.g.,
<code class="docutils literal notranslate"><span class="pre">'xkcd:sky</span> <span class="pre">blue'</span></code>; case insensitive);</li>
<li>one of the Tableau Colors from the 'T10' categorical palette (the default
color cycle): <code class="docutils literal notranslate"><span class="pre">{'tab:blue',</span> <span class="pre">'tab:orange',</span> <span class="pre">'tab:green',</span> <span class="pre">'tab:red',</span>
<span class="pre">'tab:purple',</span> <span class="pre">'tab:brown',</span> <span class="pre">'tab:pink',</span> <span class="pre">'tab:gray',</span> <span class="pre">'tab:olive',</span> <span class="pre">'tab:cyan'}</span></code>
(case-insensitive);</li>
<li>a "CN" color spec, i.e. 'C' followed by a number, which is an index into the
default property cycle (<code class="docutils literal notranslate"><a class="reference external" href="../tutorials/introductory/customizing.html?highlight=axes.prop_cycle#a-sample-matplotlibrc-file"><span class="pre">rcParams["axes.prop_cycle"]</span></a></code> (default: <code class="docutils literal notranslate"><span class="pre">cycler('color',</span> <span class="pre">['#1f77b4',</span> <span class="pre">'#ff7f0e',</span> <span class="pre">'#2ca02c',</span> <span class="pre">'#d62728',</span> <span class="pre">'#9467bd',</span> <span class="pre">'#8c564b',</span> <span class="pre">'#e377c2',</span> <span class="pre">'#7f7f7f',</span> <span class="pre">'#bcbd22',</span> <span class="pre">'#17becf'])</span></code>)); the indexing is intended to
occur at rendering time, and defaults to black if the cycle does not include
color.</li>
</ul>
<div class="section" id="classes">
<h2>Classes<a class="headerlink" href="#classes" title="Permalink to this headline">¶</a></h2>
<table border="1" class="longtable docutils align-default">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.BoundaryNorm.html#matplotlib.colors.BoundaryNorm" title="matplotlib.colors.BoundaryNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">BoundaryNorm</span></code></a>(boundaries, ncolors[, clip, extend])</td>
<td>Generate a colormap index based on discrete intervals.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.Colormap.html#matplotlib.colors.Colormap" title="matplotlib.colors.Colormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Colormap</span></code></a>(name[, N])</td>
<td>Baseclass for all scalar to RGBA mappings.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.DivergingNorm.html#matplotlib.colors.DivergingNorm" title="matplotlib.colors.DivergingNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">DivergingNorm</span></code></a>(vcenter[, vmin, vmax])</td>
<td>[<em>Deprecated</em>]</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.LightSource.html#matplotlib.colors.LightSource" title="matplotlib.colors.LightSource"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LightSource</span></code></a>([azdeg, altdeg, hsv_min_val, ...])</td>
<td>Create a light source coming from the specified azimuth and elevation.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.LinearSegmentedColormap.html#matplotlib.colors.LinearSegmentedColormap" title="matplotlib.colors.LinearSegmentedColormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LinearSegmentedColormap</span></code></a>(name, segmentdata[, ...])</td>
<td>Colormap objects based on lookup tables using linear segments.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.ListedColormap.html#matplotlib.colors.ListedColormap" title="matplotlib.colors.ListedColormap"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ListedColormap</span></code></a>(colors[, name, N])</td>
<td>Colormap object generated from a list of colors.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.LogNorm.html#matplotlib.colors.LogNorm" title="matplotlib.colors.LogNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LogNorm</span></code></a>([vmin, vmax, clip])</td>
<td>Normalize a given value to the 0-1 range on a log scale.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.NoNorm.html#matplotlib.colors.NoNorm" title="matplotlib.colors.NoNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">NoNorm</span></code></a>([vmin, vmax, clip])</td>
<td>Dummy replacement for <a class="reference internal" href="_as_gen/matplotlib.colors.Normalize.html#matplotlib.colors.Normalize" title="matplotlib.colors.Normalize"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Normalize</span></code></a>, for the case where we want to use indices directly in a <a class="reference internal" href="cm_api.html#matplotlib.cm.ScalarMappable" title="matplotlib.cm.ScalarMappable"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ScalarMappable</span></code></a>.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.Normalize.html#matplotlib.colors.Normalize" title="matplotlib.colors.Normalize"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Normalize</span></code></a>([vmin, vmax, clip])</td>
<td>A class which, when called, linearly normalizes data into the <code class="docutils literal notranslate"><span class="pre">[0.0,</span> <span class="pre">1.0]</span></code> interval.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.PowerNorm.html#matplotlib.colors.PowerNorm" title="matplotlib.colors.PowerNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">PowerNorm</span></code></a>(gamma[, vmin, vmax, clip])</td>
<td>Linearly map a given value to the 0-1 range and then apply a power-law normalization over that range.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.SymLogNorm.html#matplotlib.colors.SymLogNorm" title="matplotlib.colors.SymLogNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">SymLogNorm</span></code></a>(linthresh[, linscale, vmin, ...])</td>
<td>The symmetrical logarithmic scale is logarithmic in both the positive and negative directions from the origin.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.TwoSlopeNorm.html#matplotlib.colors.TwoSlopeNorm" title="matplotlib.colors.TwoSlopeNorm"><code class="xref py py-obj docutils literal notranslate"><span class="pre">TwoSlopeNorm</span></code></a>(vcenter[, vmin, vmax])</td>
<td>Normalize data with a set center.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="functions">
<h2>Functions<a class="headerlink" href="#functions" title="Permalink to this headline">¶</a></h2>
<table border="1" class="longtable docutils align-default">
<colgroup>
<col width="10%" />
<col width="90%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.from_levels_and_colors.html#matplotlib.colors.from_levels_and_colors" title="matplotlib.colors.from_levels_and_colors"><code class="xref py py-obj docutils literal notranslate"><span class="pre">from_levels_and_colors</span></code></a>(levels, colors[, extend])</td>
<td>A helper routine to generate a cmap and a norm instance which behave similar to contourf's levels and colors arguments.</td>
</tr>
<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.hsv_to_rgb.html#matplotlib.colors.hsv_to_rgb" title="matplotlib.colors.hsv_to_rgb"><code class="xref py py-obj docutils literal notranslate"><span class="pre">hsv_to_rgb</span></code></a>(hsv)</td>
<td>Convert hsv values to rgb.</td>
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<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.rgb_to_hsv.html#matplotlib.colors.rgb_to_hsv" title="matplotlib.colors.rgb_to_hsv"><code class="xref py py-obj docutils literal notranslate"><span class="pre">rgb_to_hsv</span></code></a>(arr)</td>
<td>Convert float rgb values (in the range [0, 1]), in a numpy array to hsv values.</td>
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<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.to_hex.html#matplotlib.colors.to_hex" title="matplotlib.colors.to_hex"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_hex</span></code></a>(c[, keep_alpha])</td>
<td>Convert <em>c</em> to a hex color.</td>
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<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.to_rgb.html#matplotlib.colors.to_rgb" title="matplotlib.colors.to_rgb"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_rgb</span></code></a>(c)</td>
<td>Convert <em>c</em> to an RGB color, silently dropping the alpha channel.</td>
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<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.to_rgba.html#matplotlib.colors.to_rgba" title="matplotlib.colors.to_rgba"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_rgba</span></code></a>(c[, alpha])</td>
<td>Convert <em>c</em> to an RGBA color.</td>
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<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.to_rgba_array.html#matplotlib.colors.to_rgba_array" title="matplotlib.colors.to_rgba_array"><code class="xref py py-obj docutils literal notranslate"><span class="pre">to_rgba_array</span></code></a>(c[, alpha])</td>
<td>Convert <em>c</em> to a (n, 4) array of RGBA colors.</td>
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<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.is_color_like.html#matplotlib.colors.is_color_like" title="matplotlib.colors.is_color_like"><code class="xref py py-obj docutils literal notranslate"><span class="pre">is_color_like</span></code></a>(c)</td>
<td>Return whether <em>c</em> can be interpreted as an RGB(A) color.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.same_color.html#matplotlib.colors.same_color" title="matplotlib.colors.same_color"><code class="xref py py-obj docutils literal notranslate"><span class="pre">same_color</span></code></a>(c1, c2)</td>
<td>Return whether the colors <em>c1</em> and <em>c2</em> are the same.</td>
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<tr class="row-even"><td><a class="reference internal" href="_as_gen/matplotlib.colors.makeMappingArray.html#matplotlib.colors.makeMappingArray" title="matplotlib.colors.makeMappingArray"><code class="xref py py-obj docutils literal notranslate"><span class="pre">makeMappingArray</span></code></a>(N, data[, gamma])</td>
<td>[<em>Deprecated</em>] Create an <em>N</em> -element 1-d lookup table.</td>
</tr>
<tr class="row-odd"><td><a class="reference internal" href="_as_gen/matplotlib.colors.get_named_colors_mapping.html#matplotlib.colors.get_named_colors_mapping" title="matplotlib.colors.get_named_colors_mapping"><code class="xref py py-obj docutils literal notranslate"><span class="pre">get_named_colors_mapping</span></code></a>()</td>
<td>Return the global mapping of names to named colors.</td>
</tr>
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