ContrastScore - WCAG Accessibility Checker

by clementinacaruso170 · Functionality & UI

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Instantly check color contrast ratios to ensure your designs meet WCAG accessibility standards.

Users

0 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#347K

#267K among extensions

Version

1.0.0

updated 26 May 2026

Users

monthly, 5 months

Latest, 15 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 5 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About ContrastScore - WCAG Accessibility Checker

ContrastScore is a fast, accurate, and offline WCAG accessibility checker built right into your browser. Designed with a striking, highly-legible Swiss/Bauhaus architectural design, this tool ensures your text and background color combinations are perfectly readable for users with visual impairments. Key Features: Real-Time Math: Instantly calculates the mathematical contrast ratio between any two colors based on the official WCAG relative luminance formula. AA & AAA Checks: Visually see if your color pairing passes standard AA (4.5:1) compliance or strict AAA (7.0:1) compliance in real time. Live Preview: See exactly how your text will look against your background color directly inside the app. Swiss Design UI: Enjoy a distinct, grid-based, bold interface that prioritizes function and clarity above all else. Zero Permissions Required: ContrastScore operates completely offline in your browser. It does not read your web pages, store your data, or require any invasive permissions. Build a more accessible web with confidence. Keep ContrastScore in your toolbar and check your colors on the fly!