WCAG 2.1 Compliance Engine
Color Contrast Checker
Ensure your text and interactive UI elements pass accessibility guidelines (AA: 4.5:1, AAA: 7:1, Large: 3:1).
WCAG Contrast & Accessibility Studio
Evaluate WCAG 2.1 compliance ratios and Color Vision Deficiencies
AAA ≥ 7.0AA ≥ 4.5Large ≥ 3.0
Normal Text (16px)AAA Pass
The quick brown fox jumps
High-contrast accessibility preview testing readability in real-time.
Calculated Ratio4.52 : 1
Normal (AA)Pass
Large TextPass
Enhanced (AAA)Fail
Test Against:
Color Vision Deficiency (CVD) SimulationHow color-blind users perceive your palette
WCAG Level AA (Minimum)
Requires a contrast ratio of at least 4.5:1 for normal text (under 18pt / 14pt bold) and 3:1 for large text and UI boundaries.
WCAG Level AAA (Enhanced)
Requires a contrast ratio of at least 7:1 for normal text and 4.5:1 for large text for maximum readability across all visual conditions.
Non-Text Contrast
Icons, buttons, borders, and input fields must achieve at least 3:1 against adjacent background colors.