🎨 WCAG 2.1 Contrast & Accessibility

Color Contrast Checker & Palette Studio

Calculate WCAG 2.1 compliance ratios for foreground and background colors in real time. Features live typography previews, AA/AAA rating badges, and color harmony generators.

Text / Foreground Color

Background Color

Presets:

Contrast Ratio

16.14 : 1

Excellent Accessibility Meets all WCAG 2.1 AAA requirements

Normal Text AA ≥ 4.5:1

PASS

Normal Text AAA ≥ 7.0:1

PASS

Large Text AA ≥ 3.0:1

PASS

UI Elements AA ≥ 3.0:1

PASS

Live Interactive Typography & UI Preview

Preview Component 18pt / 24px Bold Headline

The quick brown fox jumps over the lazy dog

Accessible digital interfaces ensure that readable copy and clear interactive controls can be perceived by people with visual impairments, color blindness, or low contrast monitors.

Underlined Text Link

Generated Harmonious Shades Click any swatch to copy HEX

Understanding WCAG 2.1 Color Contrast Standards

The Web Content Accessibility Guidelines (WCAG 2.1) specify relative luminance ratios between text and background colors to ensure digital products are accessible to users with low vision or color perception deficiencies:

Level AA (Minimum): Requires a contrast ratio of at least 4.5:1 for normal body text (under 18pt regular or 14pt bold) and at least 3.0:1 for large text and interactive UI borders.
Level AAA (Enhanced): Requires a contrast ratio of at least 7.0:1 for normal text and 4.5:1 for large text headings.
Zero Cloud Uploads: TabKit calculates all relative luminance algorithms locally inside your browser using client-side JavaScript. None of your brand guidelines or color schemes are sent to external servers.