Validate color contrast ratios, simulate visual deficiencies, and fix failing colors instantly with our "Smart Suggestor" engine.
This is normal paragraph text (14pt). Accessibility is not just a feature, it's a fundamental aspect of user experience design. The quick brown fox jumps over the lazy dog.
Add your brand colors to instantly see which combinations are safe to use together.
* Numbers represent the contrast ratio. Green means AA compliance (>=4.5), Yellow means large text / UI compliance (>=3.0), Red means fail.
Accessibility is no longer optional. With the rollout of the Web Content Accessibility Guidelines (WCAG) 2.2, ensuring your website has adequate color contrast is a critical step for both legal compliance and broad user reach. The most common accessibility failure is low color contrast (e.g., light grey text on a white background).
The standard minimum contrast requirement for paragraph text (typically below 18pt or 14pt bold).
The strictest contrast standard for normal text, required for total compliance in highly critical environments.
Required ratio for large headings (18pt+ or 14pt+ bold) and UI components like borders, borders, and icons.
Our tool goes beyond simple pass/fail reporting. If your brand color combinations fail to meet the required ratios, our algorithms calculate the relative luminance of the colors and automatically step the lightness towards a compliant state, preserving your original hue and saturation as much as physically possible.
Over 300 million people worldwide have some form of color vision deficiency (CVD). To create an inclusive design, you must ensure your UI uses more than just color to convey information. Our live SVG Matrix Vision Simulator instantly morphs your color combinations to represent what users with Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), or Achromatopsia (monochromacy) actually see.
Validate color contrast for dark mode interfaces. Ensure AA compliance on black and dark grey backgrounds. Follow these simple steps to get started with the Dark Mode Contrast Validator tool.
Dark Mode Contrast Validator is a free, browser-based color contrast and accessibility checker designed to ensure your designs meet WCAG accessibility standards. It requires no downloads, no sign-ups, and processes everything privately on your device.
Validate color contrast for dark mode interfaces. Ensure AA compliance on black and dark grey backgrounds. Whether you're a professional, student, or hobbyist, this tool simplifies what would otherwise require expensive software or technical expertise.
Built with modern web technologies, the tool works on any device — desktop, tablet, or mobile. All processing happens client-side, meaning your files and data never leave your browser, ensuring complete privacy and security.
Here's why Dark Mode Contrast Validator is the right tool for the job:
Yes, this tool is 100% free with no hidden charges, no sign-up requirements, and no usage limits. You can use it as many times as you need.
Absolutely. All processing happens directly in your browser using client-side JavaScript. Your files and data are never uploaded to any server, ensuring complete privacy and security.
Yes, Dark Mode Contrast Validator is fully responsive and works on smartphones, tablets, and desktop computers. It's optimized for all modern browsers including Chrome, Safari, Firefox, and Edge.
No installation is required. The tool runs entirely in your web browser. Simply open the page and start using it immediately — no downloads, plugins, or extensions needed.
Yes, you are free to use any output generated by this tool for personal, educational, or commercial purposes without any attribution requirements.