Color Universal Design colourblind-friendly python matplotlib palette

This repository contains a python file cud.py which contains a dictionary, list, and associated function for creating a palette based on the Color Universal Design.

-	Hex	Color
	#000000	Black
	#e69f00	Orange
	#56b4e9	Skyblue
	#009e73	Bluish Green
	#f0e442	Yellow
	#0072b2	Blue
	#d55e00	Vermilion
	#cc79a7	Redish Purple

Usage

Copy and paste the contents of cud.py into your project and use the cud() function as follows.

The standard 8-colour palette

palette = cud()
plot_colourtable(palette)

Or you can offset and start from the second colour

palette = cud(start=1)
plot_colourtable(palette)

Or only select three colours

palette = cud(n=3)
plot_colourtable(palette)

See utils.py for the code used to generate the above plots.

A common usecase for such a palette would be with seaborn

import seaborn as sns
sns.set_theme(style="whitegrid")
penguins = sns.load_dataset("penguins")
palette = cud()
# Draw a nested barplot by species and sex
g = sns.catplot(
    data=penguins, kind="bar",
    x="species", y="body_mass_g", hue="sex",
    errorbar="sd", alpha=.6, height=6,
    palette=palette
)
g.despine(left=True)
g.set_axis_labels("", "Body mass (g)")
g.legend.set_title("")