Luminance Packages

Utility functions for working with colors in adherence to WCAG 2.1 guidelines.

APCA: the Accessible Perceptual Contrast Algorithm, a modern contrast method that improves readability contrast on self-illuminated displays. Developed for the W3C's WCAG 3 and other standards.

For a given color, find a contrasting color (not optimal).

A package based on WCAG 2.0 to easily check contrast ratio.

Delta Phi Star is a general purpose method of determining perceptual lightness contrast developed by Andrew Somers (Myndex Research), and is a sibling of APCA and SACAM. It is a simplified method using easily invertible standardized maths, however it lack

Helps to determine what color of text goes best for a given background, light or dark (and vice versa).

Library for converting colour codes and manipulating relative luminance and contrast ratio

A React hook for using luminance,support React18

helper function for WCAG contrast criterion

Evaluate if a to colors have sufficient contrast to pass WCAG requirements.

Compare colors to one another. Especially useful for validating color input fields.

Relative luminance formula

Color converter for JavaScript/TypeScript

Allows you to control Hue, Saturation, and Relative Luminance as if it where a color space. Inputs are the Hue, Saturation, and Relative Luminance of a color, and output is an array of RGB values ranging from 0 to 1, 0 to 255, and a string containing the

See Stars • a lightweight set of utilities to take an sRGB or displayP3 color, and extract the CIE Y relative luminance, and then convert to CIE L* (perceptual lightness). Takes RGB colors as simple arrays (as created with colorParsley). Bonus utilities t