Tag: Design
How Big Should Your QR Code Be? The Print-Size Formula (with Examples)
The 10:1 rule, the math behind it, and worked examples for business cards, posters, and billboards. Plus camera resolution and lighting caveats.
Color Contrast for QR Codes: The 4:1 Rule and the Logo-Embedding 30% Rule
Why your branded QR fails to scan, the WCAG-adjacent 4:1 luminance ratio, and how much logo you can safely embed before error correction breaks down.
QR Error Correction Levels: When to Use L, M, Q, or H
Pick the right QR error correction level. L, M, Q, H explained with real recommendations for screens, print, industrial labels, and logo-embedded codes.