Free Tool

QR Code Contrast Checker

Check if your QR code colors have enough contrast for reliable scanning. Poor contrast is the #1 reason QR codes fail to scan.

Choose Your Colors

The dark squares in your QR code

The light squares in your QR code

Excellent

21.00: 1

Perfect contrast for all scanning conditions

1:14.5:17:121:1
FailPoorGoodExcellent

Live Preview

This is how your QR code colors will appear

QR Code Contrast Requirements

  • 7:1 or higher - Excellent. Works in all conditions including low light and at angles.
  • 4.5:1 to 7:1 - Good. Reliable scanning in normal conditions.
  • 3:1 to 4.5:1 - Poor. May fail in suboptimal lighting or on certain devices.
  • Below 3:1 - Fail. Will likely not scan. Choose different colors.

Ready to create a QR code with these colors?