Unknown author · Functionality & UI
1 item
Instantly check color contrast ratios to ensure your designs meet WCAG accessibility standards. 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!
May 26, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.