Quick guide
Try it with your own data when you’re ready.
Try an example
You enter
- Text color (HEX)
#000
- Second color (HEX)
#fff
You get
- Contrast ratio
21.0000:1
- AA — normal text
✓
- AA — large text
✓
- AAA — normal text
✓
- AAA — large text
✓
How it works & limits
Enter opaque 3- or 6-digit hex colors. Decisions use the unrounded ratio: AA requires 4.5 for normal text or 3 for large text; AAA requires 7 or 4.5.
Large means at least 18pt, or 14pt bold. ✓ meets the threshold; ✗ does not. This checks colors, not full accessibility.