Ensure Qodex custom visual branding designs scan instantly by checking module contrast compliance.
Test relative contrast ratios on custom hex color configurations.
Perfect compliance (meets WCAG 4.5:1 AA benchmarks).
Our tools align with international barcode specifications (ISO/IEC 18004:2015) and WCAG 2.1 digital luminance contrast compliance equations.
Visual custom branding is a core feature of Qodex. To ensure that styled modules remain scannable under poor light, this Contrast Checker calculates compliance with WCAG 2.1 AA luminance standards, serving developers and creators.
Contrast is computed using WCAG relative luminance formulas: Ratio = (L1 + 0.05) / (L2 + 0.05), where L represents the color's relative brightness. A compliance rating of at least 4.5:1 is required for normal text and barcode scannability.
Always keep the foreground modules darker than the background. Light modules on dark backgrounds (inverted QR codes) are readable by most modern smartphones, but older models may struggle to locate the finder patterns. Always maintain a stark contrast difference.
We recommend a minimum contrast ratio of 4.5:1, which complies with WCAG 2.1 AA standards, ensuring compatibility with all mobile cameras.
Yes, but ensure that the lightest point of the gradient still maintains a contrast ratio of at least 4.5:1 against the background.