QR Code Colors and Contrast: What Works and What Does Not

By November 14, 2026

A black and white QR code is reliable, but you can match your brand colors too. The key is contrast, the difference in brightness between the code and its background. Scanners read brightness, not color.

The golden rule

The code must be clearly darker than the background. Think about how the colors look in a black-and-white photo. If the code and background look almost the same gray, a scanner will struggle.

Combinations that work well

  • Black on white
  • Dark blue on white (the QRIQO default)
  • Dark green on a pale yellow or white background
  • Deep purple on white
  • Dark red or maroon on white

Combinations to avoid

  • Yellow, light orange or light gray on white
  • Red on green or blue on red, which look different to the eye but similar in brightness
  • Light code on a dark background, because some scanners cannot read inverted codes
  • Gradients or photos behind the code

Tips for branded codes

  • Choose a dark version of your brand color for the code.
  • Keep the background white or very light.
  • Use the Squares style for maximum compatibility. Rounded and Dots look nicer but are slightly less universal.
  • Always add a clear margin.

Printing changes colors

Screens and printers show colors differently. A color that looks fine on your phone may look washed out on paper, so print a sample first.

Check before you finish

The QRIQO generator measures the contrast for you and warns you when it is low, and it blocks downloads when the colors are too close to scan reliably. Always finish with a real test scan.

Tips & Tricks

How to Use QR Codes on Business Cards and Flyers

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A QR code on printed material connects paper to your online world. But a code that is too small, badly placed or missing a reason to scan will be ignored. These tips help you get it right. Business cards Business cards have little space, so keep it simple: Use a vCard QR code to share your contact details, or a link to your website or portfolio. Print the code at least 2 cm (0.8 in) wide. Put it on the back so the front stays clean. Keep the content short. Less data means a simpler, easier code. Flyers and brochures On a flyer, make the code about 2.5 to 3 cm wide and place it where the eye naturally ends, often the bottom corner. Always add a short call to action such as "Scan to see the menu" or "Scan to book". Posters For posters, size depends on distance. A useful rule is to divide the scanning distance by 10. For a poster read from 1 meter away, the code should be about 10 cm wide. Give people a reason to scan People scan when they know what they...

QR Code Error Correction Explained: L, M, Q and H

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Is a Wi-Fi QR Code Safe? What to Know Before You Share One

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