QR Code Design & Customisation

QR Code 디자인 모범 사례

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Fundamental design rules: contrast, quiet zone, module size, colour choice, and testing methodology for branded QR codes.

  
  

    
  








  
  

    
    
      
      
  1. 
        QR Code Design Best Practices
      
    2. 
      
      
  2. 
        Contrast Is King
      
    3. 
      
      
  3. 
        The Quiet Zone
      
    4. 
      
      
  4. 
        Module Size and Scan Distance
      
    5. 
      
      
  5. 
        Colour Guidelines
      
    6. 
      
      
  6. 
        Testing Methodology
      
    7. 
      
      
  7. 
        Key Takeaways
      
    8. 
      
    

  









  
  

  
  

    
    

      
QR Code Design Best Practices


Effective QR code design balances visual appeal with reliable scannability. These fundamental rules apply whether you are creating simple codes or branded designs.


Contrast Is King


The single most important design rule: maintain high contrast between dark and light modules. The classic black-on-white provides maximum contrast, but other combinations work if the module brightness difference (min 37.5%)." data-category="Scanning & Reading">contrast ratio exceeds 40%.


Rules:
- Dark modules must be significantly darker than light modules
- Dark on light — never the reverse (light modules on dark background)
- Avoid mid-tone colours for either module type
- Test with greyscale conversion — if the modules are distinguishable in greyscale, the contrast is sufficient


The Quiet Zone


The quiet zone — a 4-module minimum white margin — is non-negotiable. Violating it is the most common cause of scan failure. When integrating QR codes into designs, ensure no graphics, borders, or text enter this margin.


Module Size and Scan Distance


Every QR code has a minimum print size determined by the expected scan distance. The rule of thumb: QR code width >= scan distance / 10. A code scanned from 30 cm should be at least 3 cm wide.


For more precise calculations, consider the camera resolution and the minimum resolvable module size (~0.33 mm for close-range scanning). See the sizing guide for detailed formulas.


Colour Guidelines


    

  • Brand colours can replace black, but must be dark enough
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  • Light modules can use a colour other than white, but must be clearly lighter than dark modules
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  • Avoid gradients across the QR code — they create inconsistent contrast
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  • Red or orange on white provides poor contrast for some cameras — test thoroughly
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Testing Methodology


Before printing at scale:


    

  1. Print a test copy at the final size on the final material
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  2. Scan with the native camera on at least 3 devices (iOS and Android)
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  3. Scan at the expected distance and angle
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  4. Scan in representative lighting conditions
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  5. Verify the decoded content is correct
    6. 



Key Takeaways


    

  • High contrast between dark and light modules is the top priority
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  • Maintain the 4-module quiet zone margin without exception
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  • QR code width should be at least 1/10th of the scan distance
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  • Brand colours work if they maintain sufficient contrast
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  • Always test on physical prints before mass production
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