Myndex

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).

bridge-pca. 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.

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.

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

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.

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.

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

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.

apca-introduction. The corrected introduction to APCA, a rebuttal and discussion of xi's repo from which this is forked.

brintness. brintness is an integer brightness/lightness/darkness calculation

apca. This is the APCA Web Tool for technology demonstration at apcacontrast.com

TuttleAndButtle. Technical responses to common misconceptions about APCA

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

apca-grid. Will be an APCA version of ContrastGrid

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

color2k. a color parsing and manipulation lib served in roughly 2kB

ColorGlossy. A glossary of color, contrast, and vision terms

mac-cvd. No changes yet, forked to update the methods to the clinically accurate BV

assessing_chart_interactivity. A repository for experimental environments where we intend to test assistive technology user experience with complex static and interactive charts and graphs.

low-vision-a11y-tf. Low Vision Accessibility Task Force

iro.js. 🎨 Modular color picker widget for JavaScript, with support for a bunch of color formats