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I do not like the default color of the grid in matplotlib plot. How can I change it?

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The grid() function of matplotlib supports keyword arguments (**kwargs) to define the line properties of the grid, e.g.:

grid(color='r', linestyle='-', linewidth=2)

So, you need to use the color argument to set the color of your choice.

Here is a sample code:

import matplotlib.pyplot as plt

plt.grid(which='both', axis='both', linestyle='--', color='lavender')