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<div class="section" id="module-colorsys">
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<span id="colorsys-conversions-between-color-systems"></span><h1><a class="reference internal" href="#module-colorsys" title="colorsys: Conversion functions between RGB and other color systems."><code class="xref py py-mod docutils literal notranslate"><span class="pre">colorsys</span></code></a> — Conversions between color systems<a class="headerlink" href="#module-colorsys" title="Permalink to this headline">¶</a></h1>
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<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.7/Lib/colorsys.py">Lib/colorsys.py</a></p>
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<p>The <a class="reference internal" href="#module-colorsys" title="colorsys: Conversion functions between RGB and other color systems."><code class="xref py py-mod docutils literal notranslate"><span class="pre">colorsys</span></code></a> module defines bidirectional conversions of color values
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between colors expressed in the RGB (Red Green Blue) color space used in
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computer monitors and three other coordinate systems: YIQ, HLS (Hue Lightness
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Saturation) and HSV (Hue Saturation Value). Coordinates in all of these color
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spaces are floating point values. In the YIQ space, the Y coordinate is between
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0 and 1, but the I and Q coordinates can be positive or negative. In all other
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spaces, the coordinates are all between 0 and 1.</p>
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<div class="admonition seealso">
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<p class="admonition-title">See also</p>
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<p>More information about color spaces can be found at
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<a class="reference external" href="http://poynton.ca/ColorFAQ.html">http://poynton.ca/ColorFAQ.html</a> and
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<a class="reference external" href="https://www.cambridgeincolour.com/tutorials/color-spaces.htm">https://www.cambridgeincolour.com/tutorials/color-spaces.htm</a>.</p>
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<p>The <a class="reference internal" href="#module-colorsys" title="colorsys: Conversion functions between RGB and other color systems."><code class="xref py py-mod docutils literal notranslate"><span class="pre">colorsys</span></code></a> module defines the following functions:</p>
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<dl class="function">
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<dt id="colorsys.rgb_to_yiq">
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<code class="descclassname">colorsys.</code><code class="descname">rgb_to_yiq</code><span class="sig-paren">(</span><em>r</em>, <em>g</em>, <em>b</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.rgb_to_yiq" title="Permalink to this definition">¶</a></dt>
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<dd><p>Convert the color from RGB coordinates to YIQ coordinates.</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.yiq_to_rgb">
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<code class="descclassname">colorsys.</code><code class="descname">yiq_to_rgb</code><span class="sig-paren">(</span><em>y</em>, <em>i</em>, <em>q</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.yiq_to_rgb" title="Permalink to this definition">¶</a></dt>
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<dd><p>Convert the color from YIQ coordinates to RGB coordinates.</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.rgb_to_hls">
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<code class="descclassname">colorsys.</code><code class="descname">rgb_to_hls</code><span class="sig-paren">(</span><em>r</em>, <em>g</em>, <em>b</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.rgb_to_hls" title="Permalink to this definition">¶</a></dt>
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<dd><p>Convert the color from RGB coordinates to HLS coordinates.</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.hls_to_rgb">
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<code class="descclassname">colorsys.</code><code class="descname">hls_to_rgb</code><span class="sig-paren">(</span><em>h</em>, <em>l</em>, <em>s</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.hls_to_rgb" title="Permalink to this definition">¶</a></dt>
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<dd><p>Convert the color from HLS coordinates to RGB coordinates.</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.rgb_to_hsv">
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<code class="descclassname">colorsys.</code><code class="descname">rgb_to_hsv</code><span class="sig-paren">(</span><em>r</em>, <em>g</em>, <em>b</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.rgb_to_hsv" title="Permalink to this definition">¶</a></dt>
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<dd><p>Convert the color from RGB coordinates to HSV coordinates.</p>
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</dd></dl>
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<dl class="function">
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<dt id="colorsys.hsv_to_rgb">
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<code class="descclassname">colorsys.</code><code class="descname">hsv_to_rgb</code><span class="sig-paren">(</span><em>h</em>, <em>s</em>, <em>v</em><span class="sig-paren">)</span><a class="headerlink" href="#colorsys.hsv_to_rgb" title="Permalink to this definition">¶</a></dt>
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<dd><p>Convert the color from HSV coordinates to RGB coordinates.</p>
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</dd></dl>
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<p>Example:</p>
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<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">colorsys</span>
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<span class="gp">>>> </span><span class="n">colorsys</span><span class="o">.</span><span class="n">rgb_to_hsv</span><span class="p">(</span><span class="mf">0.2</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">)</span>
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<span class="go">(0.5, 0.5, 0.4)</span>
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<span class="gp">>>> </span><span class="n">colorsys</span><span class="o">.</span><span class="n">hsv_to_rgb</span><span class="p">(</span><span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">)</span>
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<span class="go">(0.2, 0.4, 0.4)</span>
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