Compare software

Contraste vs Contrast Ratio: catalog facts
Contraste	Contrast Ratio
Free The app is available to download for free.	Free Free to use in the browser.
macOS	Web
Checks text and background color combinations against WCAG thresholds Runs on macOS High Sierra and newer	Updates the ratio live as you type Handles semi-transparent colors with an error margin
Available only for macOS	Checks one color pair at a time The hosting page includes marketing content from Siege Media
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.