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APCA

This site is a live web page of the primary GitHub repo for the APCA/SAPC project. Documentation linked below.

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APCA Documentation Index

Accessible Perceptual Contrast Algorithm

Simple Overview, QuickStart, and FAQ

These are intended for end users, and those interested in a plain language overview without a lot of the math & theory.

Sciencey Stuff!

Maths! Vision Science! Photons on Parade!

For Developers

THIS REPOSITORY, and apca-w3 ARE THE ONLY CANONICAL SOURCES OF APPROVED APCA CODE.

Discussion Forum

Got Questions? We Got Answers!

W3 Licensed Version_

APCA W3 Repository Please source all files for tools intended for WCAG 3 conformance from that specific repository. The files in this repository are part of other projects, and not necessary for WCAG 3 compliance.

Bridge PCA

Bridge PCA Repository Do you want to improve readability, but you are forced to used WCAG 2 contrast to the letter of a regulation? Then Bridge PCA is for you. It is backward compatible with WCAG 2, but using APCA technology.

More Resources and Articles

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