How to Change the Line Color in a Pyplot Line Graph?

By setting the ‘color’ argument, we can specify the color of the lines. Following table summarizes the different formats that we can specify a value to the color argument.

 

Format	Description
Color names	Color names like 'red', 'green', 'blue', 'black', 'white', 'purple', 'orange' can be specified directly. Reference: https://matplotlib.org/2.0.2/api/colors_api.html
Color abbreviations	Single character abbreviations are supported. For example, 'r' for red, 'g' for green, 'b' for blue, 'k' for black, 'w' for white, etc.
Hexadecimal notation	Color can be specified using a six-digit hexadecimal representation of colors. For example, '#FF0000' represents red, '#00FF00' represents green, and '#0000FF' represents blue.
RGB notation	Color can be specified using RGB tuple. For example, (1, 0, 0) represents red, (0, 1, 0) represents green, and (0, 0, 1) represents blue.
RGBA notation	Similar to RGB, but it takes an addition value to represent opacity rangin from 0 to 1.

 

Examples

# Red color line
plt.plot(x1, y1, color='red', label='red-line')

# Green color line
plt.plot(x2, y2, color='g', label='green-line')

# Blue color line
plt.plot(x3, y3, color='#0000FF', label='blue-line')

# Aqua color line
plt.plot(x4, y4, color=(0, 1, 1), label='aqua-line')

# Red color line with opacity 0.5
plt.plot(x5, y5, color=(1, 0, 0, 0.5), label='red-line-opacity')

 Find the below working application.

line_color.py

import matplotlib.pyplot as plt
import numpy as np

# Sample data
x1 = [5, 10, 15, 20, 25]
y1 = [20, 40, 60, 80, 100]

x2 = [10, 20, 30, 40, 50]
y2 = [30, 60, 90, 120, 150]

x3 = [15, 30, 45, 60, 75]
y3 = [8, 16, 24, 32, 40]

x4 = [12, 24, 36, 48, 60]
y4 = [15, 30, 45, 60, 75]

x5 = [8, 16, 24, 32, 40]
y5 = [25, 50, 75, 100, 125]

# Red color line
plt.plot(x1, y1, color='red', label='red-line')

# Green color line
plt.plot(x2, y2, color='g', label='green-line')

# Blue color line
plt.plot(x3, y3, color='#0000FF', label='blue-line')

# Aqua color line
plt.plot(x4, y4, color=(0, 1, 1), label='aqua-line')

# Red color line with opacity 0.5
plt.plot(x5, y5, color=(1, 0, 0, 0.5), label='red-line-opacity')

# Ti display the legend on the plot
plt.legend()

plt.show()

 

Output

 

 

  

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