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.
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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

deltaphistar

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
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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