qr-codes.biz User Guide
Colors, Transparency & Gradients
Set the main QR colors, transparent background, monochrome mode, and linear or radial gradients.
Foreground and background
Choose the main QR foreground and background colors. You can also make the background transparent.
Monochrome
Black & White (Monochrome) quickly returns the core QR treatment to a high-contrast black-and-white appearance.
Gradient
Enable a Linear or Radial gradient, choose a Gradient Color, and select an angle from 0° through 315° in 45° steps.
Tip: High contrast between the QR foreground and background is one of the most reliable ways to improve scanning.