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        "\n# Named color sequences\n\nMatplotlib's `~matplotlib.colors.ColorSequenceRegistry` allows access to\npredefined lists of colors by name e.g.\n``colors = matplotlib.color_sequences['Set1']``.  This example shows all of the\nbuilt in color sequences.\n\nUser-defined sequences can be added via `.ColorSequenceRegistry.register`.\n"
      ]
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    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
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      "source": [
        "import matplotlib.pyplot as plt\nimport numpy as np\n\nimport matplotlib as mpl\n\n\ndef plot_color_sequences(names, ax):\n    # Display each named color sequence horizontally on the supplied axes.\n\n    for n, name in enumerate(names):\n        colors = mpl.color_sequences[name]\n        n_colors = len(colors)\n        x = np.arange(n_colors)\n        y = np.full_like(x, n)\n\n        ax.scatter(x, y, facecolor=colors, edgecolor='dimgray', s=200, zorder=2)\n\n    ax.set_yticks(range(len(names)), labels=names)\n    ax.grid(visible=True, axis='y')\n    ax.yaxis.set_inverted(True)\n    ax.xaxis.set_visible(False)\n    ax.spines[:].set_visible(False)\n    ax.tick_params(left=False)\n\n\nbuilt_in_color_sequences = [\n    'tab10', 'tab20', 'tab20b', 'tab20c', 'Pastel1', 'Pastel2', 'Paired',\n    'Accent', 'Dark2', 'Set1', 'Set2', 'Set3', 'petroff10']\n\n\nfig, ax = plt.subplots(figsize=(6.4, 9.6), layout='constrained')\n\nplot_color_sequences(built_in_color_sequences, ax)\nax.set_title('Built In Color Sequences')\n\nplt.show()"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        ".. admonition:: References\n\n   The use of the following functions, methods, classes and modules is shown\n   in this example:\n\n   - `matplotlib.colors.ColorSequenceRegistry`\n   - `matplotlib.axes.Axes.scatter`\n\n.. tags::\n\n   styling: color\n   purpose: reference\n\n"
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