UtilityVerified Tool
Color Contrast Checker
Check foreground and background color contrast before shipping UI text and controls.
Foreground
Background
Readable text previewBody text, buttons, and labels look like this.
WCAG AA normal textPass
WCAG AAA normal textPass
Large text / UIPass
This tool runs in your browser. Inputs stay local and are not sent to any server.
How to use this result
Contrast checking prevents beautiful but unreadable design decisions, especially on mobile screens.
Examples
Dark text
In#181514 on #f3efe7
OutReadable high-contrast pairing
Common questions
Q.Is contrast the only accessibility requirement?
No. It is one important baseline along with size, focus states, semantics, and interaction design.
Data handling notice
Browser-local processing: the main calculation or conversion runs in your browser.
No server storage: except for UI preferences such as favorites, ZHS does not store your input files or text on the server.
Sensitive-data caution: even with local processing, avoid entering production secrets, national IDs, financial data, or raw customer data into public web tools.