Basics 2026-04-28 7 min By Cornelious Fazal

QR Code with Logo: Error Correction, Sizing, and Contrast

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Quick Answer

A logo removes or covers modules, so keep it modest, centered away from functional patterns, and backed by a clear knockout area. Higher error correction may improve tolerance but does not guarantee decoding; test every exported and printed version on representative devices.

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// FAQ

Frequently Asked Questions

A logo does not universally require Level H, although higher correction can provide more recovery capacity. The safe choice depends on payload density, logo size, placement, contrast, and print quality. Keep functional patterns untouched and test the exact finished code; error-correction percentages are not logo-size guarantees.

No standards-based percentage guarantees a safe logo size. A modest centered logo is less risky than a large or irregular overlay, but payload density and the covered modules matter. Begin small, preserve functional patterns and quiet zone, then test each export and production sample on representative devices.

Place the logo strictly in the center of the matrix. Never cover or touch the three large corner Finder Patterns, Timing Patterns, Alignment Patterns, or Format Information strips near the corners. Validate the final material, size, contrast, quiet zone, and placement rather than approving only the artwork file.

A solid knockout background plate (1 to 2 modules wide) prevents detailed logo artwork from merging into adjacent QR data modules, ensuring camera edge-detection algorithms can distinguish data boundaries. A screen preview is insufficient; scan the finished piece before approving the full print or engraving run.

Maintain at least a 4:1 luminance contrast ratio between foreground modules and the background. Dark modules on a light solid background provide the highest readability across varied lighting conditions. Test a production sample on several phones at the intended distance and under the lighting used on site.
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