Variable: QR\_CODE\_MIN\_CONTRAST\_RATIO

const QR_CODE_MIN_CONTRAST_RATIO: 3 = 3;

Defined in: shared/qr-code/schemas.ts:26

Minimum contrast ratio between the dark modules and the light background. 3:1 is the WCAG 2.1 AA threshold for non-text content (SC 1.4.11) and is also about where commodity scanners start to fail thresholding.