Developer Utility
Color Contrast Checker
Calculate the contrast ratio between text and background colors and verify whether the combination passes WCAG AA and AAA accessibility standards.
Color Input
Enter text and background colors using HEX codes or select them with the color picker.
This sample text helps visualize how text appears on a background in a real interface. Useful for checking content areas, buttons, cards, banners, and dark mode color schemes.
Check Result
Review the calculated contrast ratio and WCAG accessibility compliance.
Enter colors and click Check Contrast.
The accessibility report will appear here.
Contrast Standard Comparison
Different accessibility requirements apply depending on text size and compliance level.
Body text, labels, menus, and descriptions generally require at least a 4.5:1 contrast ratio.
Large headings and bold text can meet AA requirements with a lower 3:1 ratio.
Check readability when selecting colors for buttons, badges, cards, forms, and other interface elements.
Help
What is Color Contrast Checker?
Color Contrast Checker is a free developer and design utility that calculates the contrast ratio between text and background colors to evaluate readability.
Useful for websites, blog themes, buttons, cards, dark mode interfaces, landing pages, and design systems.
Features
- Contrast ratio calculation
- WCAG AA and AAA compliance check
- Separate evaluation for normal and large text
- HEX code input and color picker support
- Live preview
- Copy accessibility report
Use Cases
- Checking website text readability
- Testing button and background accessibility
- Reviewing blog theme color combinations
- Validating dark mode color schemes
- Auditing landing page and card UI designs
- Reviewing design system palettes
What are WCAG AA and AAA standards?
WCAG defines accessibility standards for web content. Normal text requires at least 4.5:1 for AA and 7:1 for AAA. Large text requires at least 3:1 for AA and 4.5:1 for AAA.
What is considered large text?
Large text generally refers to larger headings or bold text. It is allowed lower contrast thresholds than normal body text.
Is higher contrast always better?
Higher contrast improves readability, but excessive contrast may feel visually harsh. Balance accessibility with design aesthetics.
Which HEX formats are supported?
Supports both 6-digit HEX codes such as #111827 and 3-digit HEX codes such as #fff. The # symbol is added automatically if omitted.
Does passing the test guarantee accessibility?
No. Contrast ratio is only one part of accessibility. Font size, weight, spacing, device settings, and user conditions should also be considered.