Myndex/bridge-pca

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Created almost 3 years ago
Updated over 1 year ago

Myndex/bridge-pca

Myndex

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A simplified version of the APCA math to bridge from WCAG_2 contrast math to the future, while being 100% backwards compatible with WCAG_2 contrast. By "backwards compatible" we mean if bridge-pca passes it, it will automatically pass WCAG_2 contrast.

SAPC-APCA

APCA (Accessible Perceptual Contrast Algorithm) is a new method for predicting contrast for use in emerging web standards (WCAG 3) for determining readability contrast. APCA is derived form the SAPC (S-LUV Advanced Predictive Color) which is an accessibility-oriented color appearance model designed for self-illuminated displays.

apca-w3

The APCA version, to be licensed for use with guidelines: W3/AGWG.

deltaphistar

𝜟𝜱✴︎ or Delta Phi Star is a variant method of determining lightness contrast, and a sibling of APCA and SACAM. It is a simplified version using easily invertible standardized maths, however it lacks some useful properties such as polarity sensitivity. In fact, it is intended for applications where a "general" simplifed perceptual contrast is desired, where polarity sensitivity is not needed (or is ambiguous).

colorparsley

A lightweight but versatile mini-lib to parse color strings, objects, or numbers, returning a simple rgba array, and related string utilities. This was developed as part of the basic APCA distro.

max-contrast

Send it the background color, returns black or white whichever is maximum Lc value

fancyfontflipping

Fancy Font Flipping is a demo I first put up in CodePen to illustrate the issues with flipping the text color from black to white based on a given estimated background luminance.

seelab

sRGB parsing and processing RGB data in and out of CIE XYZ, xyY, LAB and LUV, and more!

Myndex

A catalog of Myndex Research content, including APCA articles & documentation, related code repositories, and resources.

seestars

See Stars is a Myndex MicroColor Library. This has standard functions for the standard (piecewise) IEC conversion of sRGB to Y, and the CIE standard Y to L* (Lstar) and back again. The math & constants here reference those of CSS 4 for compatibility.

brintness

brintness is an integer brightness/lightness/darkness calculation

tinytrim

A set of CSS generic classes for on-the-fly adjustment of elements without having to use style="" — this CSS sheet is mainly for use in development and early design stages.

AuralAccessibility

Aural Accessibility Research Project: A discussion area for ideas relating to guidelines for aural perception.

ColorGlossy

A glossary of color, contrast, and vision terms

Illuminated

A repo collecting the more substantial comments Myndex made regarding typography, CSS, color, contrast, and vision.

TuttleAndButtle

Canonical rebuttals to sponsored rumors regarding APCA, APC-RC, BridgePCA, etc.