python – Generate random colors (RGB)

python – Generate random colors (RGB)

A neat way to generate RGB triplets within the 256 (aka 8-byte) range is

color = list(np.random.choice(range(256), size=3))

color is now a list of size 3 with values in the range 0-255. You can save it in a list to record if the color has been generated before or no.

You could also use Hex Color Code,

Name    Hex Color Code  RGB Color Code
Red     #FF0000         rgb(255, 0, 0)
Maroon  #800000         rgb(128, 0, 0)
Yellow  #FFFF00         rgb(255, 255, 0)
Olive   #808000         rgb(128, 128, 0)

For example

import matplotlib.pyplot as plt
import random

number_of_colors = 8

color = [#+.join([random.choice(0123456789ABCDEF) for j in range(6)])
             for i in range(number_of_colors)]
print(color)

[#C7980A, #F4651F, #82D8A7, #CC3A05, #575E76, #156943, #0BD055, #ACD338]

Lets try plotting them in a scatter plot

for i in range(number_of_colors):
    plt.scatter(random.randint(0, 10), random.randint(0,10), c=color[i], s=200)

plt.show()

python – Generate random colors (RGB)

Here:

def random_color():
    rgbl=[255,0,0]
    random.shuffle(rgbl)
    return tuple(rgbl)

The result is either red, green or blue. The method is not applicable to other sets of colors though, where youd have to build a list of all the colors you want to choose from and then use random.choice to pick one at random.