Color Contrast Checker [2025]

Beyond Simple Contrast

While contrast ratios are important, consider these additional factors for truly accessible designs:

• Font weight and size can affect perceived readability
• Consider testing with actual users who have vision impairments
• Avoid relying solely on color to convey information (add icons, patterns, or text)
• Implement alternative text and screen reader compatibility
• Test your design in various lighting conditions and on different displays

Working with Brand Colors

If your brand colors don't meet contrast requirements, consider these strategies:

• Adjust shade or tint while maintaining hue
• Use accessible colors for text and critical UI elements
• Implement your brand colors in larger decorative elements where contrast is less critical
• Consider a secondary, more accessible palette for digital platforms
• Add subtle backgrounds or borders to improve contrast

How accurate is this contrast checker?

This tool implements the precise mathematical formula specified in the WCAG guidelines for calculating contrast ratios. It provides identical results to the official W3C contrast calculation methodology, offering reliable guidance for accessibility compliance.

Does this work for text on gradients or images?

This tool checks solid foreground colors against solid background colors. For text on gradients or images, you should test against the lowest-contrast area or consider adding a solid background/overlay behind text. The WCAG specifically notes that text on gradients or images should maintain proper contrast throughout.

Are there exceptions to these contrast requirements?

Yes, WCAG provides exceptions for logos, decorative elements that don't convey information, and inactive UI components. Text that's part of an image serving as pure decoration is also exempt. However, it's still best practice to make all elements as accessible as possible.