CODE EXAMPLE FOR PYTHON

matplotlib boxplot fill box with pattern

import numpy as np
import matplotlib.pyplot as plt

# fake up some data
spread= np.random.rand(50) * 100
center = np.ones(25) * 50
flier_high = np.random.rand(10) * 100 + 100
flier_low = np.random.rand(10) * -100
data = np.concatenate((spread, center, flier_high, flier_low), 0)

# basic plot
bp = plt.boxplot(data, patch_artist=True)

for box in bp['boxes']:
    # change outline color
    box.set(color='red', linewidth=2)
    # change fill color
    box.set(facecolor = 'green' )
    # change hatch
    box.set(hatch = '/')

plt.show()