The Contrast Checker helps you determine if two colors (text and background) have sufficient contrast for readability and accessibility according to WCAG standards.
Step-by-step Guide
1. Open the tool
Visit: Color Contrast Checker
2. Enter your colors
Use a color picker or enter HEX values, for example: #0028f0 and #ffffff
- Foreground color (text color)
- Background color
3. View the result
The tool automatically displays:
-
Contrast ratio →
8.19:1 -
Accessibility status →
PassorFail
4. Understand the ratings
For colors #0028f0 and #ffffff:
| Text Size | AA Level | AAA Level |
|---|---|---|
| Large text | Pass | Pass |
| Small text | Pass | Pass |
Minimum WCAG requirements
AA (minimum standard):
- Small text → 4.5:1
- Large text → 3:1
AAA (best accessibility):
- Small text → 7:1
- Large text → 4.5:1
Maximum possible contrast is 21:1 (black on white)
5. Preview your design
The tool may show sample text using your selected colors so you can visually evaluate readability.
6. Adjust colors if needed
If contrast fails:
- Darken the text color
- Lighten the background
- Try a different shade
Repeat until you pass at least AA.
💡 Tips
- Aim for AA minimum, AAA preferred
- Test both normal and large text sizes
- Don’t rely only on visual judgment - always verify contrast
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Source
This article was originally published by DEV Community and written by colorswall.
Read original article on DEV Community