Contrast Ratio Calculator
Calculate the relative contrast ratio between foreground and background colors.
What is Contrast Ratio Calculator?
Calculate the contrast ratio between a foreground color and a background color. The result helps developers and designers evaluate whether a color combination provides sufficient visual distinction for text and interface elements.
How to use
- Choose a foreground color.
- Choose a background color.
- Calculate the contrast ratio.
- Review the resulting ratio.
Features
- Foreground and background color inputs
- Contrast ratio calculation
- HEX color support
- Instant results
- Browser-based processing
Common Use Cases
- Web accessibility
- UI design
- Text readability
- Color palette testing
- Design system development
Example
Foreground: #000000 Background: #FFFFFF
Contrast ratio: 21:1
FAQ
What does the contrast ratio represent?
The contrast ratio represents the difference in relative luminance between two colors and ranges from 1:1 to 21:1.
What is the maximum contrast ratio?
The maximum possible contrast ratio is 21:1, produced by black against white.
Is this the same as a WCAG checker?
The calculator focuses on calculating the contrast ratio, while a WCAG contrast checker can additionally evaluate the result against accessibility requirements.
Missing a feature?
If this tool doesn't cover your use case or is missing functionality, please let me know through the Contact page.
New improvements and features are added based on user feedback.