Quadratic Equation Solver (ax² + bx + c = 0)
About QR Code Color Generator
The Custom Color & Gradient QR Code Designer generates branded QR codes with custom foreground/background colors, 2-color linear/radial gradients, eye marker color customization, and contrast ratio validation (WCAG AAA compliance).
How to Use QR Code Color Generator
Step 1
Enter your URL or QR code text.
Step 2
Pick foreground color/gradient and background color.
Step 3
Customize corner eye locator colors.
Step 4
Check the contrast meter to ensure it reads "High Scannability".
Step 5
Download your custom colored QR Code.
Practical Use Cases for QR Code Color Generator
Brand-Aligned Marketing QR Codes for Packaging & Ads
Design QR codes matching your company's brand guidelines with custom brand gradient colors and rounded corner pixels for luxury packaging.
High-Contrast Dark Mode & Inverted QR Codes
Generate sleek dark-mode QR codes with validated 4.5:1+ contrast ratios ensuring 100% scan reliability on all phone cameras.
Input & Output Examples
Designing Neon Gradient QR Code
Data: `https://brand.com`, Foreground: `Purple to Cyan Linear Gradient (45°)`, Background: `Clean White`
Striking branded QR Code with 12.4:1 contrast ratio (WCAG AAA Compliant) exported in SVG/PNG
Key Features & Performance
- ✓Color Options: Solid Colors, Linear Gradients (0° to 360°), Radial Gradients, and Transparent Backgrounds.
- ✓Custom Eye Colors: customize the outer frame and inner center dot colors of the 3 corner locator squares independently.
- ✓Real-Time WCAG Contrast Checker: warns if color choices do not provide sufficient optical contrast for camera sensors.
- ✓100% Client-Side Canvas 2D / SVG generator.
- ✓1-Click Download high-res PNG and vector SVG.
Key Terminology & Definitions
Corner Eye Markers
The three square position finder patterns used by camera sensors to detect QR code orientation and perspective skew.
Optical Contrast Ratio
The difference in luminance between foreground data modules and background canvas; a minimum 4.5:1 ratio ensures reliable camera recognition.