What is a Color Contrast Checker?

What is color contrast? Color contrast is the difference in lightness and color between two elements, most commonly text and its background. The higher the contrast, the easier it is to read.

So what is color contrast ratio? A color contrast ratio is a numerical score that measures the difference. It's expressed as a ratio like 4.5:1, where a higher number means higher contrast. For example, a ratio of 1:1 would be the same color on the same color. Totally unreadable. 21:1 is the max. Think black text on white background.

What is accessible color contrast? Accessible color contrast means your text meets a contrast ratio that most people, including those with low vision or colorblindness, can comfortably read. This is where WCAG comes in.

What is WCAG color contrast? WCAG stands for the Web Content Accessibility Guidelines. These are the globally recognized standards for accessible design. For color contrast, WCAG accepts two levels. AA which requires a minimum ratio of 4.5:1 for normal text, and AAA, which has a stricter ratio of 7:1 for enhanced accessibility and readability. Most teams aim for AA compliance as a baseline.

So what is a color contrast checker? Color contrast checker is a tool that takes your two colors, your text color and your background color, and instantly calculates the contrast ratio between them. Using a color contrast checker helps take the guesswork out of accessible design. The key takeaway here, whether you're a designer, developer, or content creator, running your colors is through a color contrast checker is one of the simplest things you can do to make your content more accessible and ensure you're meeting WCAG AA compliance standards. A color contrast checker is the fastest way to ensure your designs meet accessibility standards.