⚡ Real-Time ADA & WCAG Audit

Color Contrast Evaluator

Modern UI/UX accessibility tool conforming to official WCAG 2.1 standards. Calculate ratios instantly, visualize compliance on live text layouts, and snap to nearest compliant tones.

Targeted Keyword

color contrast checker

MSV: 45,000 · KD: 14

Targeted Keyword

wcag contrast checker

MSV: 9,900 · KD: 10

Targeted Keyword

hex contrast checker

MSV: 4,400 · KD: 7

Targeted Keyword

accessible combinations

MSV: 1,200 · KD: 5

This color contrast evaluator helps designers and developers verify that text and background color combinations meet the Web Content Accessibility Guidelines WCAG 2.1. The tool calculates the relative luminance of each color using the sRGB linearization formula and computes the contrast ratio as specified by the World Wide Web Consortium W3C. Results are displayed with AA and AAA compliance badges for both normal text at least 4.5 to 1 and large text at least 3.0 to 1. You can adjust foreground lightness in real time using the Smart Hue Lightness Fixer slider, which highlights fail, AA pass, and AAA pass zones. The bulk contrast checker analyzes multiple color codes at once against your chosen background. Every evaluation is saved to your session history for quick recall.

Color Settings

Foreground Color (Text) HSL: 0°, 0%, 0%

Background Color HSL: 0°, 0%, 0%

Popular Presets

Smart Hue/Lightness Fixer

AUTOTUNE

Drag the slider to adjust the foreground lightness. The bar indicates contrast compliance regions: Red (Fail), Yellow (Pass AA), and Green (Pass AAA).

Lightness: 50% 1.0:1

Snap to nearest compliance

Contrast Ratio

3.42:1

AA Fail

Compliance Breakdown

WCAG 2.1 AA (Normal Text)

Req: 4.5:1

WCAG 2.1 AA (Large Text)

Req: 3.0:1

WCAG 2.1 AAA (Normal Text)

Req: 7.0:1

WCAG 2.1 AAA (Large Text)

Req: 4.5:1

Live Text Mockup

Large Text (Bold 24px+)

Designing Accessible Interfaces

Normal Body Text (Regular 16px)

Accessibility (A11y) is not a feature, it is a design foundation. Providing high contrast color combinations ensures that individuals with moderate low vision, color blindness, or situational limitations (like reading under direct sunlight) can read and interact with your platform seamlessly.

User Interface Components

Interactive UI Tag

Bulk Contrast Checker

POWER TOOL

Enter multiple hex codes (one per line, or comma-separated) below. We will calculate the contrast ratio and compliance of each one against your current background color (#1E293B).

Luminance Contrast Mathematics

FORMULAS

Interested in the calculations? Discover how relative luminance and contrast ratios are calculated under official WCAG 2.1 specifications. View mathematical steps, linearization calculations, and a real-time trace.

View Math & Formula Trace →

Evaluation History

No calculations evaluated yet in this session.