Scanning reliability starts with contrast
QR codes work best with strong contrast between foreground and background. Dark modules on a light background are the safest default.
Decorative colors can work, but avoid low contrast combinations, busy backgrounds, and gradients that make module edges hard to distinguish.
Respect the quiet zone
The quiet zone is the blank margin around a QR code. It helps scanners detect the code boundary. Cropping too close or placing text against the code can reduce scan reliability.
For print, test the final size from the real scanning distance. A code that works on a monitor may fail when printed too small on packaging or flyers.
Keep destinations trustworthy
A QR code is only as useful as its destination. Use HTTPS links, avoid unnecessary redirects, and make the landing page mobile-friendly.
For business cards, events, and menus, test the destination after publishing. Broken QR codes are hard to fix once printed.
Practical checklist
- Use dark foreground on a light background.
- Keep a clear quiet zone around the code.
- Test printed QR codes at real size and distance.
- Use HTTPS URLs when linking to websites.
- Keep barcode labels clear and machine-readable.