15 Feb Change the background color of the Matplotlib legend
The set_facecolor() function in Matplotlib is used to set the background color of the legend. Before moving further, we’ve prepared a video tutorial to change the background color of the Matplotlib Legend:
Example
Let us see an example wherein we will set the legend color to red, which displays the Frequency and Periods:
import numpy as np
import matplotlib.pyplot as plt
# Data
a = np.arange(5)
b = [2,4,6,8,10]
c = [5, 6, 7, 8, 9]
# Create plots
fig = plt.figure()
ax = plt.subplot()
ax.plot(a, b, 'k--', label='Frequency')
ax.plot(a, c, 'k:', label='Periods')
# Create a legend using the Matplotlib Axes.legend() method in Python.
# Set the position using the loc parameter of the legend() method
legend = ax.legend(loc='upper center')
# Set the background color of the legend using the set_facecolor() function
legend.get_frame().set_facecolor('red')
# Plot Title
plt.title("Frequency of a Signal")
# Display
plt.show()
Output
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