Contrast checker
See whether your text is readable — and whether it meets accessibility requirements.
Free · No sign-up · Runs in your browser
Light grey on white looks elegant on your monitor and is unreadable on a phone in sunlight. Contrast is the one objective measurement here.
Contrast
6.85:1
- Body text (AA, 4.5:1)✓ Passes
- Large text (AA, 3:1)✓ Passes
- UI and icons (3:1)✓ Passes
How it looks
A large heading
Body text on this background
This follows the exact WCAG 2 formula. If another tool gives you a different number it is probably averaging the channels instead of linearising them — an audit will report the value shown here.
How to use it
- Pick the text colour and the background colour.
- Read the ratio — 4.5:1 is the minimum for body text.
- Check the sample on the right to see how it actually reads.
- If it fails, darken the text or lighten the background until it passes.
What to know
This follows the exact WCAG 2 formula, including the sRGB channel linearisation. Many online checkers simply average the channels and report a different number — an audit will use the value shown here.
Tell us briefly what you need. We reply within one working day — with concrete ideas, a timeline and a price.