/usr/share/matplotlib/mpl-data/stylelib/seaborn-pastel.mplstyle is in python-matplotlib-data 1.5.1-1ubuntu1.
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1 2 | # Seaborn pastel palette
axes.prop_cycle: cycler('color', ['92C6FF', '97F0AA', 'FF9F9A', 'D0BBFF', 'FFFEA3', 'B0E0E6'])
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