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Easily Check Color Contrast for Accessibility!
Color Contrast Checker is a free online application to find optimal color contrast for user interface elements. This tool follows the WCAG, which is a series of recommendations for making web content more accessible. Check color contrast between the text and its background and make your web content easy to read!
Why is Color Contrast Important?
Color contrast is a significant component in website design. Good contrast enhances readability and accessibility, making your website more user-friendly for everyone, including those with visual impairments. Meeting WCAG standards ensures legal compliance and improves user experience. Our free tool calculates contrast ratios instantly, helping you to choose colors for better visibility.
Color Contrast Ratio
Color contrast ratio measures the difference in brightness between two colors, ensuring text and UI elements stand out against their backgrounds. Contrast ratios can range from 1 to 21. WCAG defines two levels of compliance depending on the success criteria: AA (minimum contrast) and AAA (enhanced contrast):
- The level AA requires a contrast ratio of 4.5:1 for normal text and 3:1 for large or bold text.
- The level AAA requires a 7:1 contrast ratio for normal text and 4.5:1 for large or bold text.
- Fast and easy way to check contrast for your site's design
- Multiple ways to choose colors: manually or using the color picker tool
- Compliance indicators for Web Content Accessibility Guidelines (WCAG)
- No limits, no registration and software installation
- Works from your favorite device: fully compatible with PCs, tablets, and smartphones
How to Check Color Contrast
- Enter either the background and foreground colors in HEX format, or select them using the color picker. After choosing a color, you may adjust the lightness.
- On the preview panel at the left, you will see how the selected color pair will appear for large, normal, bold text and UI elements.
- The tool instantly calculates the contrast ratio, and the panel at the left and below shows if the selected color pair matches WCAG contrast requirements. Providing a “Good“ or “Excellent“ ratio can make it easier for visually impaired users to read and interact with your website content.
- How is a color contrast ratio calculated?The contrast ratio is determined using WCAG formulas, measuring the difference in perceived brightness between two colors. The difference is measured on a ratio scale that starts at 1:1 (for white on white), up to 21:1 (for black on white).
- What is the recommended contrast ratio for text?For WCAG AA compliance, text must have a minimum ratio of 4.5:1 or 3:1 for large (18 pt or more) or bold text. For AAA compliance, the ratio should be 7:1 for normal text and 4.5:1 for large or bold text. The larger the font and wider the stroke, the more legible it will be with less contrast. Consequently, the contrast requirements for larger fonts are lower.
Fast and Easy Contrast Checker
First, select the foreground and background colors.The contrast value will be shown immediately and told if the selected colors pass WCAG contrast requirements or not.Check Contrast Ratio from Anywhere
It works from all platforms including Windows, Linux, Mac OS, Android and iOS. All files are processed on our servers. No plugin or software installation required for you.Color Contrast Checker Quality
All data are processed using Aspose APIs, which are established well in the software industry and used by many Fortune 100 companies across 114 countries.