material-color-utilities 0.2.3

Theme color library for Material You.

Material Color Utilities

Material Color Utilities is a Python package for working with Material Design color systems. This package includes utilities for generating themes from colors or images, extracting prominent colors from images, converting colors, and calculating contrast ratios.

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Installation

Install the package directly from pip:

pip install material-color-utilities

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Features

• Theming
  • Generate Material Design themes from source colors or images.
• Image Processing
  • Extract prominent colors from images.
• Contrast Ratio
  • Calculate contrast ratios between colors.

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Usage

Complete API documentation here: API docs.

Importing the Library

from material_color_utilities import (
    CustomColor,
    Variant,
    argb_from_hex,
    hex_from_argb,
    prominent_colors_from_image,
    theme_from_color,
    theme_from_image,
    get_contrast_ratio
)

Generate a Theme

From a Source Color

theme = theme_from_color("#FC03A3", 3.0, Variant.EXPRESSIVE)
# now apply the theme somewhere
# Example, assuming dark theme:
button.color = theme.schemes.dark.primary
button.text_color = theme.schemes.dark.on_primary
background.color = theme.schemes.dark.surface_container
text_paragraph.color = theme.schemes.dark.on_surface

From an Image

This package will handle converting to RGBA and resizing for performance, so any PIL image can be passed.

from PIL import Image

image = Image.open("path/to/image.jpg")
# You can *optionally* pass a list of custom colors to generate palettes that harmonize with the source color.
custom_colors = [CustomColor("#4285F4", "Google Blue", True)]
theme = theme_from_image(image, 4.0, Variant.CONTENT, custom_colors)

Theme to dict

A Theme object can be converted to a dict, an example theme dict can be found here.

theme = theme_from_color("#FF0000")
theme_dict = theme.dict()

Extract Prominent Colors from an Image

This package will handle converting to RGBA and resizing for performance, so any PIL image can be passed.

from PIL import Image

image = Image.open("path/to/image.jpg")
colors = prominent_colors_from_image(image, 5)
print(colors)  # Outputs a list of up to 5 prominent colors

Calculate Contrast Ratio

ratio = get_contrast_ratio("#000000", "#FFFFFF")
print(ratio)  # Outputs: 21.0

Convert Colors

ARGB from HEX

argb = argb_from_hex("#4285f4")
print(argb)  # Outputs: 4286017588 (0xFF4285F4)

HEX from ARGB

hex_color = hex_from_argb(0xFF4285F4)
print(hex_color)  # Outputs: "#4285f4"

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Testing

To run the tests, install uv, and execute:

uv sync --dev # install packages
uv run pytest tests

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License

This project is "forked" from material-foundation/material-color-utilities/.

This project is licensed under the Apache License 2.0. See the LICENSE file for details.

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Links

• PyPI: https://pypi.org/project/material-color-utilities
• Original C++ source: https://github.com/material-foundation/material-color-utilities
• Material Design Guidelines: https://material.io/design

How to publish a release

• Push to main
• Create release on GitHub
• Wait 30 minutes