sunasty-color-math
Zero-dependency Python utility for sRGB, HSL, and OKLCH color space conversions, relative luminance, and WCAG 2.1 contrast calculation.
Originally developed for the Sunasty Color Picker client-side tool and the Sunasty Developer Toolkit.
Features
- sRGB & OKLCH: Fast, exact conversions using Björn Ottosson's Oklab matrices.
- WCAG 2.1 Conformance: Relative luminance calculation and contrast ratios from
1.0:1to21.0:1. - Zero Dependencies: Pure standard library, compatible with Python 3.8+.
Installation
pip install sunasty-color-math
Quick Start
from sunasty_color_math import hex_to_rgb, contrast_ratio, check_wcag, rgb_to_oklch
# Parse colors
teal = hex_to_rgb("#0F766E")
white = (255, 255, 255)
# Calculate WCAG contrast
ratio = contrast_ratio(teal, white)
print(f"Contrast ratio: {ratio}:1")
conformance = check_wcag(ratio)
print(f"Passes AA normal text: {conformance['aa_normal']}")
# Convert to OKLCH
l, c, h = rgb_to_oklch(*teal)
print(f"Lightness: {l}, Chroma: {c}, Hue: {h}°")
Related Tools
- Sunasty Color Picker & Palette Extractor
- Sunasty Developer Utilities
- Sunasty Color Picker Chrome Extension
License
MIT © Bastien Sulyan
1 maintainer
Metadata
1 maintainer
Release files for sunasty-color-math 1.0.0
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