GUIDE深度 · Deep dive
QR Design: Color, Quiet Zone and Print
Scanners find modules by contrast. Dark modules on a light background are safest; leave a quiet zone of at least four modules; print no smaller than about 2x2 cm, larger for distance scanning. Colors are fine if contrast stays high.
Dark foreground on a light background; avoid low contrast.
Keep at least a four-module quiet zone; do not crop the edge.
Size for scanning distance, often at least 2x2 cm in print.
Scan with both iOS and Android, near and far.
Scan the printed proof, not just the screen.
FAQ
Can I invert colors?
Some scanners handle it, but compatibility drops; prefer dark-on-light.
Is higher ECC always better?
It resists damage but is denser and can be harder at small sizes; choose by use case.