New more-accessible color cycle

A new color cycle named 'petroff10' was added. This cycle was constructed using a

combination of algorithmically-enforced accessibility constraints, including

color-vision-deficiency modeling, and a machine-learning-based aesthetics model

developed from a crowdsourced color-preference survey. It aims to be both

generally pleasing aesthetically and colorblind accessible such that it could

serve as a default in the aim of universal design. For more details

see `Petroff, M. A.: "Accessible Color Sequences for Data Visualization"

<https://arxiv.org/abs/2107.02270>`_ and related `SciPy talk`_. A demonstration

is included in the style sheets reference_. To load this color cycle in place

of the default::

.. _reference: https://matplotlib.org/gallery/style_sheets/style_sheets_reference.html

.. _SciPy talk: https://www.youtube.com/watch?v=Gapv8wR5DYU

_petroff10_data = (

(0.24705882352941178, 0.5647058823529412, 0.8549019607843137), # 3f90da

(1.0, 0.6627450980392157, 0.054901960784313725), # ffa90e

(0.7411764705882353, 0.12156862745098039, 0.00392156862745098), # bd1f01

(0.5803921568627451, 0.6431372549019608, 0.6352941176470588), # 94a4a2

(0.5137254901960784, 0.17647058823529413, 0.7137254901960784), # 832db6

(0.6627450980392157, 0.4196078431372549, 0.34901960784313724), # a96b59

(0.9058823529411765, 0.38823529411764707, 0.0), # e76300

(0.7254901960784313, 0.6745098039215687, 0.4392156862745098), # b9ac70

(0.44313725490196076, 0.4588235294117647, 0.5058823529411764), # 717581

(0.5725490196078431, 0.8549019607843137, 0.8666666666666667), # 92dadd

)

'petroff10': _cm._petroff10_data,

# Color cycle survey palette from Petroff (2021):

# https://arxiv.org/abs/2107.02270

# https://github.com/mpetroff/accessible-color-cycles

axes.prop_cycle: cycler('color', ['3f90da', 'ffa90e', 'bd1f01', '94a4a2', '832db6', 'a96b59', 'e76300', 'b9ac70', '717581', '92dadd'])

patch.facecolor: 3f90da

'Accent', 'Dark2', 'Set1', 'Set2', 'Set3', 'petroff10']