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relative-luminance

calculate relative luminance

v2.0.1 URL: https://unpkg.com/relative-luminance@2.0.1/dist/index.umd.js

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colorluminance

apca-w3

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.

v0.1.9 URL: https://unpkg.com/apca-w3@0.1.9/src/apca-w3.js

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CSSHTMLPDFRTFsRGBRGBP3displayP3Adobe RGBLChLstarcolorcolourcontrastlightnessbrightnessluminanceluminance contrastlightness contrastperceptual contrastvisual contrastcolor contrastcolour contrasttext contrastAPCA contrastA11y contrastconstant contrastaccessible contrastreadability contrastreadabilityaccessibilitycontrast sensitivityspatial frequencyspacial frequencydesign toolsdesign systemsdesign guidelinestypographya11yW3CWCAGWCAG 2WCAG 3SACAMSAPCAPCA

is-dark-color

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

v1.2.0 URL: https://unpkg.com/is-dark-color@1.2.0/dist/index.js

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colorluminancedarklight

get-contrast-ratio

Calculate contrast ratio between two CSS color strings.

v0.2.1 URL: https://unpkg.com/get-contrast-ratio@0.2.1/build/index.js

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luminancerelative-luminancecontrastcontrast-ratiowcagaccessibilitya11ycolorcolor-contrast

a11y-contrast-color

A utility library for calculating luminance, contrast ratio, and appropriate contrast colors to ensure web accessibility.

v1.1.0 URL: https://unpkg.com/a11y-contrast-color@1.1.0/dist/src/index.js

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a11yaccessibilitycontrastcolorluminanceratio