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21.00:1
The quick brown fox jumps over the lazy dog.
Design accessible websites with confidence. The Contrast Checker instantly evaluates the color contrast between your text and background, ensuring your content is readable for everyone. It checks against WCAG guidelines (AA and AAA) so you can meet accessibility standards and provide a better user experience.
Accessibility isn't just a buzzword; it's a necessity. This tool calculates the luminance difference between two colors. A low contrast ratio makes text hard to read for people with low vision or color blindness. Meeting WCAG standards ensures your site is inclusive and usable by the widest possible audience.
This tool uses the relative luminance formula defined by the W3C. The contrast ratio can range from 1:1 (no difference) to 21:1 (black text on white). WCAG Level AA requires a ratio of at least 4.5:1 for normal text, while Level AAA requires 7:1.
For normal text, aim for at least 4.5:1 (Level AA). For large text (18pt+), 3:1 is acceptable. Ideally, try for 7:1 (Level AAA) for maximum accessibility.
It ensures people with visual impairments can read your content. Plus, accessible sites often rank better in SEO and are easier for everyone to use, even in bright sunlight.
It improves it! High contrast usually leads to cleaner, more legible designs.
All calculations and data processing for this tool are performed locally in your browser. UtilToolkits does not send any of your data to an external server, ensuring your information remains private and secure.