""" ========== Color Demo ========== Matplotlib recognizes the following formats to specify a color: 1) an RGB or RGBA tuple of float values in ``[0, 1]`` (e.g. ``(0.1, 0.2, 0.5)`` or ``(0.1, 0.2, 0.5, 0.3)``). RGBA is short for Red, Green, Blue, Alpha; 2) a hex RGB or RGBA string (e.g., ``'#0F0F0F'`` or ``'#0F0F0F0F'``); 3) a shorthand hex RGB or RGBA string, equivalent to the hex RGB or RGBA string obtained by duplicating each character, (e.g., ``'#abc'``, equivalent to ``'#aabbcc'``, or ``'#abcd'``, equivalent to ``'#aabbccdd'``); 4) a string representation of a float value in ``[0, 1]`` inclusive for gray level (e.g., ``'0.5'``); 5) a single letter string, i.e. one of ``{'b', 'g', 'r', 'c', 'm', 'y', 'k', 'w'}``, which are short-hand notations for shades of blue, green, red, cyan, magenta, yellow, black, and white; 6) a X11/CSS4 ("html") color name, e.g. ``"blue"``; 7) a name from the `xkcd color survey `__, prefixed with ``'xkcd:'`` (e.g., ``'xkcd:sky blue'``); 8) a "Cn" color spec, i.e. ``'C'`` followed by a number, which is an index into the default property cycle (:rc:`axes.prop_cycle`); the indexing is intended to occur at rendering time, and defaults to black if the cycle does not include color. 9) one of ``{'tab:blue', 'tab:orange', 'tab:green', 'tab:red', 'tab:purple', 'tab:brown', 'tab:pink', 'tab:gray', 'tab:olive', 'tab:cyan'}`` which are the Tableau Colors from the 'tab10' categorical palette (which is the default color cycle); For more information on colors in matplotlib see * the :doc:`/tutorials/colors/colors` tutorial; * the `matplotlib.colors` API; * the :doc:`/gallery/color/named_colors` example. """ import matplotlib.pyplot as plt import numpy as np t = np.linspace(0.0, 2.0, 201) s = np.sin(2 * np.pi * t) # 1) RGB tuple: fig, ax = plt.subplots(facecolor=(.18, .31, .31)) # 2) hex string: ax.set_facecolor('#eafff5') # 3) gray level string: ax.set_title('Voltage vs. time chart', color='0.7') # 4) single letter color string ax.set_xlabel('time (s)', color='c') # 5) a named color: ax.set_ylabel('voltage (mV)', color='peachpuff') # 6) a named xkcd color: ax.plot(t, s, 'xkcd:crimson') # 7) Cn notation: ax.plot(t, .7*s, color='C4', linestyle='--') # 8) tab notation: ax.tick_params(labelcolor='tab:orange') plt.show() ############################################################################# # # ------------ # # References # """""""""" # # The use of the following functions, methods, classes and modules is shown # in this example: import matplotlib matplotlib.colors matplotlib.axes.Axes.plot matplotlib.axes.Axes.set_facecolor matplotlib.axes.Axes.set_title matplotlib.axes.Axes.set_xlabel matplotlib.axes.Axes.set_ylabel matplotlib.axes.Axes.tick_params