ColorFree Tool

Color Contrast Checker

Provided byDevBoltdevbolt.dev

Checks WCAG 2.1 colour contrast ratios for AA and AAA accessibility compliance.

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About this tool

Calculates the contrast ratio between two specified colors to ensure they meet required accessibility standards. Users input a foreground color and a background color, and the tool immediately computes the numerical difference in luminance between them. It compares this result against established Web Content Accessibility Guidelines (WCAG) 2.1 criteria for both AA and AAA levels of compliance. The output clearly indicates whether the combination passes or fails these industry-standard contrast thresholds, providing immediate feedback on visual readability. Developers, web designers, and content creators utilize this utility to maintain digital accessibility across their projects. By verifying color combinations before deployment, users prevent potential barriers that could impede screen reader users or individuals with visual impairments from consuming content effectively.

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