Home of the APCA Readability Criterion.

Welcome to Inclusive Reading Technologies. We are a nonprofit dedicated to improving accessibility and visual readability, and home to the APCA Readability Criterion.

The APCA Readability Criterion (ARC) provide recommendations for making visual content on self-illuminated displays more accessible to all users, especially those with visual impairments.

• We have this forum 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.

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.

• 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.