Search results
35 packages found
Relative luminance formula
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.
Library for converting colour codes and manipulating relative luminance and contrast ratio
- colour
- color
- contrast
- contrast ratio
- luminance
- lightness
- brightness
- saturation
- hue
- chroma
- chromator
- colour conversion
Detects if a hex color is dark or light. It is based on the w3 documentation for color luminance: https://www.w3.org/TR/WCAG20/#relativeluminancedef
bare-bones color luminance functions
Evaluate if a to colors have sufficient contrast to pass WCAG requirements.
- wcag
- color
- contrast
- luminance
- contrast-ratio
- accessibility
- a11y
- relative-luminance
- color-contrast
- text-legibility
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
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
Get relative luminance from a color string.
Evaluate if a to colors have sufficient contrast to pass WCAG requirements.
- wcag
- color
- contrast
- luminance
- contrast-ratio
- accessibility
- a11y
- relative-luminance
- color-contrast
- text-legibility
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
Utility functions for working with colors in adherence to WCAG 2.1 guidelines.
- wcag
- wcag-2.1
- accessibility
- accessible
- color
- colors
- contrast
- contrast-ratio
- luminance
- luminosity
- suggestion
- generator
A package based on WCAG 2.0 to easily check contrast ratio.
Change the hue of a color without changing the relative luminance
Calculate the color in an array of colors that gives the highest contrast to another color.
Colour transformation utilities
Calculate contrast ratio between two CSS color strings.
Lightweight (no dependencies) and fast color brightness detector built with Flow Types.
Reads luminance and histogram data from JPEG images (based on Bill Yeh's pixelr)