Welcome to the APCA Readability Criterion Forum!

[Myndex]

👋 Welcome to APCA-RC Discussions!

These discussions pertain to the APCA Readability Criterion (the draft guidelines).

We hope that you will:

• Ask questions you’re wondering about.
• Share ideas, there are no bad ideas, except for ideas kept secret.
• Welcome others and maintain a positive atmosphere.
• Remember that this is a community we build together.

Guidelines Discussions Forum

• This forum is for discussing the draft guidelines for design and visual accessibility.

• For Theory & Math Discussions please see SAPC-APCA Discussions Forum, which has many discussions surrounding the underlying theories of perceptually uniform contrast, and the actual algorithm, code libraries, and math.

About APCA

Essential knowledge regarding the Accessible Perceptual Contrast Algorithm.

• The APCA Linktree, a list of essential resources.
• The APCA Easy Intro, a basic plain language quickstart.
• The Realities And Myths Of Contrast And Color, a comprehensive article on the topic of contrast in design.

Web Apps

• APCA Demo Tool, the canonical demonstrator of perceptually uniform contrast.
• An Accurate Colorblind Simulator, the Myndex Brettel/Viénot Color Vision Deficiency Simulator.
• BridgePCA, A Drop-In Replacement for WCAG 2 math, Bridge PCA is fully backwards compatible with WCAG 2 but using perceptually uniform math.