We can specify a different color for a line by using the keyword color with either an HTML color name or a HEX code:

plt.plot(days, money_spent, color='green')
plt.plot(days, money_spent_2, color='#AAAAAA')

We can also make a line dotted or dashed using the keyword linestyle.

# Dashed:
plt.plot(x_values, y_values, linestyle='--')
# Dotted:
plt.plot(x_values, y_values, linestyle=':')
# No line:
plt.plot(x_values, y_values, linestyle='')

We can also add a marker using the keyword marker:

# A circle:
plt.plot(x_values, y_values, marker='o')
# A square:
plt.plot(x_values, y_values, marker='s')
# A star:
plt.plot(x_values, y_values, marker='*')

To see all of the possible options, check out the Matplotlib documentation. Here are a couple of those values applied to our plots about lunch spending:

plt.plot(days, money_spent, color='green', linestyle='--')
plt.plot(days, money_spent_2, color='#AAAAAA',  marker='o')

Let’s get some practice with customizing lines on the same plot.