Custom QR Code Design Tips: Make Your QR Code On-Brand
QR Codes don't have to be boring black-and-white squares. By customizing colors, embedding logos, and choosing the right style, you can create branded QR Codes that are both beautiful and functional. But design choices must respect technical constraints to ensure reliable scanning.
Custom Colors
QR Code colors can be customized, but one fundamental rule must be followed: there must be sufficient contrast between dark modules and the light background.
Do
- Change black modules to dark brand colors (e.g., navy blue, dark red, dark green)
- Use white or light-colored backgrounds
- Use gradient colors in modules (ensure the lightest areas still have sufficient contrast)
Don't
- Use light modules on dark backgrounds (color inversion may cause scan failures)
- Use low-contrast color combinations (e.g., light gray on white)
- Use similar colors for modules and background
Key takeaway: WCAG recommends a minimum contrast ratio of 4.5:1. For QR Code design, aim for at least 3:1 to ensure good scanning performance. Use online contrast checker tools to verify your color scheme.
Embedding Logos
Embedding a brand logo in the QR Code center is the most popular customization. This works thanks to QR Code error correction:
| Error Correction Level | Damage Tolerance | Recommended Logo Size |
|---|---|---|
| L (7%) | 7% | Not recommended for logos |
| M (15%) | 15% | Area under 10% |
| Q (25%) | 25% | Area under 15-20% |
| H (30%) | 30% | Area under 20-25% |
When embedding logos, use H-level error correction so the QR Code remains readable even when the logo covers part of the data area.
Size and Print Guidelines
Minimum Size Rule
A QR Code's minimum size depends on two factors: module count and scanning distance. The general formula:
Minimum size = scanning distance / 10
For example, for an expected scanning distance of 30 cm, the QR Code should be at least 3 cm.
Quiet Zone
QR Codes require a blank border around them called the quiet zone. The standard requires at least 4 modules width of blank space. No text or graphics should be placed in this area.
Print Resolution
- Print materials — 300 DPI or higher recommended
- Screen display — 72-96 DPI is sufficient
- Large signage — 150 DPI with larger physical size
Module Styles
Beyond traditional square modules, modern QR Code designs also support other styles:
- Rounded squares — square shape with rounded corners, softer appearance
- Dots — replace squares with circles, more modern look
- Diamonds — use diamond shapes instead of squares
Important: do not modify the finder patterns and timing patterns — they are critical for scanner positioning.
Design Checklist
- Is the foreground-background color contrast sufficient?
- Is the logo size within safe limits?
- Are you using a high enough error correction level?
- Is the quiet zone (blank border) adequate?
- Does it scan correctly on different devices?
- Is the print quality clear and sharp?
Conclusion
Branded QR Codes let you showcase brand personality while maintaining functionality. Remember: design boldly, but always test scanning after every modification. A beautiful QR Code that can't be scanned defeats its entire purpose.
References
- ISO/IEC. "ISO/IEC 18004:2015 — QR Code bar code symbology specification." International Organization for Standardization, 2015. https://www.iso.org/standard/62021.html
- Denso Wave. "QR Code Essentials." Denso Wave Incorporated, 2024. https://www.qrcode.com/en/about/
- W3C. "Web Content Accessibility Guidelines (WCAG) 2.1 — Contrast Requirements." W3C, 2018. https://www.w3.org/TR/WCAG21/#contrast-minimum
- Samretwit, D. & Wakahara, T. "Measurement of Reading Characteristics of Multiplexed Image in QR Code." Journal of Information Processing, vol. 22, no. 4, 2014, pp. 644-651.