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import numpy as np
import matplotlib.pyplot as plt
import matplotlib as mpl

th = np.linspace(0, 2*np.pi, 128)


def demo(sty):
    mpl.style.use(sty)
    fig, ax = plt.subplots(figsize=(3, 3))

    ax.set_title('style: {!r}'.format(sty), color='C0')

    ax.plot(th, np.cos(th), 'C1', label='C1')
    ax.plot(th, np.sin(th), 'C2', label='C2')
    ax.legend()

demo('default')
demo('seaborn')

plt.show() 

　

　

　最初の色をタイトルに使用し、各スタイルの mpl.rcParams['axes.prop_cycle'] の 2 番目と 3 番目の色を使用してプロットします。

M:\______s\Specifying_Colors_01.py:9: MatplotlibDeprecationWarning: 
     The seaborn styles shipped by Matplotlib are deprecated since 3.6, 
     as they no longer correspond to the styles shipped by seaborn. However, 
     they will remain available as 'seaborn-v0_8-<style>'. Alternatively, directly use 
     the seaborn API instead.
  mpl.style.use(sty) 

Traceback (most recent call last):
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\style\core.py", line 137, in use
    style = _rc_params_in_file(style)
            ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\__init__.py", line 879, in _rc_params_in_file
    with _open_file_or_url(fname) as fd:
  File "C:\Program Files\Python312\Lib\contextlib.py", line 137, in __enter__
    return next(self.gen)
           ^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\__init__.py", line 856, in _open_file_or_url
    with open(fname, encoding='utf-8') as f:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'seaborn'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "E:\______\Specifying_Colors_01.py", line 19, in 
    demo('seaborn')
  File "E:\______\Specifying_Colors_01.py", line 9, in demo
    mpl.style.use(sty)
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\style\core.py", line 139, in use
    raise OSError(
OSError: 'seaborn' is not a valid package style, path of style file, URL of style file, or library style name 
(library styles are listed in `style.available`) 

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import numpy as np
import matplotlib.pyplot as plt
import matplotlib as mpl
import matplotlib._color_data as mcd
import matplotlib.patches as mpatch

overlap = {name for name in mcd.CSS4_COLORS
           if "xkcd:" + name in mcd.XKCD_COLORS}

fig = plt.figure(figsize=[4.8, 16])
ax = fig.add_axes([0, 0, 1, 1])

for j, n in enumerate(sorted(overlap, reverse=True)):
    weight = None
    cn = mcd.CSS4_COLORS[n]
    xkcd = mcd.XKCD_COLORS["xkcd:" + n].upper()
    if cn == xkcd:
        weight = 'bold'

    r1 = mpatch.Rectangle((0, j), 1, 1, color=cn)
    r2 = mpatch.Rectangle((1, j), 1, 1, color=xkcd)
    txt = ax.text(2, j+.5, '  ' + n, va='center', fontsize=10,
                  weight=weight)
    ax.add_patch(r1)
    ax.add_patch(r2)
    ax.axhline(j, color='k')

ax.text(.5, j + 1.5, 'X11', ha='center', va='center')
ax.text(1.5, j + 1.5, 'xkcd', ha='center', va='center')
ax.set_xlim(0, 3)
ax.set_ylim(0, j + 2)
ax.axis('off')

plt.show() 

　

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• 2023/11/05 Ver=1.04 Python 3.12.0 で確認
• 2023/11/05 Ver=1.04 Python 3.11.6 で確認
• 2023/03/11 Ver=1.03 Python 3.11.2 で確認
• 2020/10/28 Ver=1.01 Python 3.7.8 で確認
• 2018/11/08 Ver=1.01 初版リリース

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