What is a contrast checker?

A contrast checker is specifically designed to verify the sufficiency of contrast between text and its background in digital content. This is essential for web accessibility because sufficient contrast helps ensure that text is readable by individuals with visual impairments, including those with color blindness or low vision. Accessibility guidelines, such as those outlined in the WCAG (Web Content Accessibility Guidelines), set specific contrast ratios that must be met to provide a legible and user-friendly experience for all users.

Unlike tools that measure brightness or illuminate text on screens, a contrast checker focuses solely on assessing visual differences in color and light between foreground elements (like text) and the background. By helping designers and developers create high-contrast combinations, contrast checkers play a crucial role in fostering an inclusive digital environment for users with varying abilities and needs.