Scan reliability matters most
A QR code is only useful if a normal phone can scan it quickly. That is why contrast, size, and destination quality matter more than decoration. A stylish code that fails under real light conditions creates more friction than a plain code that works.
Good defaults
- Use dark foreground and light background colors.
- Choose a size large enough for the expected print or screen context.
- Link to clean destinations that load quickly on mobile devices.
Always test before publishing
Test the final code on multiple phones if possible. A code that scans on a desktop monitor may behave differently when printed small, placed behind reflective glass, or viewed under poor lighting conditions.