What is WCAG AA contrast compliance?

WCAG 2.1 Level AA requires a contrast ratio of at least 4.5:1 for normal body text and 3:1 for large text (18pt+) or UI components.

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Color Converter & Contrast Checker

Convert HEX colors to RGB, HSL, and CMYK with visual color picker and WCAG 2.1 contrast ratio accessibility scoring.

Color Converter & Contrast Checker Interactive Workspace

Client-side calculations and instant parameter controls are initializing. All processing occurs securely in your browser.

1 Enter a 3 or 6-digit HEX color code or use the visual color picker.
2 Instant conversion to RGB, HSL, and CMYK color spaces.
3 Check WCAG 2.1 contrast ratios against black and white backgrounds for accessibility compliance.

Luminance = 0.2126·R + 0.7152·G + 0.0722·B | Contrast = (L1 + 0.05) / (L2 + 0.05)

Calculations are performed with IEEE floating point mathematical precision directly in your device memory.

Input: #2563EB

Result: RGB(37, 99, 235) | HSL(221, 83%, 53%) | CMYK(84%, 58%, 0%, 8%)

Translates hexadecimal color channels across standard digital and print models.

What is WCAG AA contrast compliance?: WCAG 2.1 Level AA requires a contrast ratio of at least 4.5:1 for normal body text and 3:1 for large text (18pt+) or UI components.

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