How to use: Color Contrast Checker (WCAG)
Color Contrast Checker (WCAG) is a free online Color Tools tool that verify text contrast ratios against WCAG AA/AAA instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Use Color Contrast Checker (WCAG) now →
Description
Verify text contrast ratios against WCAG AA/AAA.
- Color Tools
- Because everything is computed client-side, Color Contrast Checker (WCAG) is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Color Contrast Checker (WCAG) takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
Against #ffffff background.
Input
#777777
Output
#777777 on #ffffff Contrast ratio: 4.48:1 WCAG 2.1: AA normal text (≥4.5): ✗ FAIL AA large text (≥3): ✓ PASS AAA normal text (≥7): ✗ FAIL AAA large text (≥4.5): ✗ FAIL UI components (≥3): ✓ PASS Verdict: Large text only (AA)
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where Color Contrast Checker (WCAG) helps:
- Verify text contrast ratios against WCAG AA/AAA.
Parameters
This tool has no options — it works on the input alone.
FAQ
What is Color Contrast Checker (WCAG)?
Color Contrast Checker (WCAG) verify text contrast ratios against WCAG AA/AAA. It runs entirely in your browser, so your data stays private.
Is Color Contrast Checker (WCAG) free to use?
Yes. Color Contrast Checker (WCAG) is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.