Question 1

What is WCAG contrast?

Accepted Answer

WCAG (Web Content Accessibility Guidelines) measures text readability using the relative luminance ratio between foreground and background colors, ranging from 1:1 to 21:1, with higher ratios being clearer. AA and AAA are two compliance levels.

Question 2

What is the difference between AA and AAA?

Accepted Answer

AA is the basic compliance level: normal text requires ≥4.5, large text requires ≥3; AAA is the enhanced level: normal text requires ≥7, large text requires ≥4.5. Large text refers to approximately 18pt regular or 14pt bold and above.

Question 3

Will data be uploaded?

Accepted Answer

No. Contrast is calculated entirely locally in your browser; color values are not sent to any server.

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