Contrast Checker is a user-friendly tool designed for designers and developers to evaluate color contrast compliance with the Web Content Accessibility Guidelines established by the World Wide Web Consortium . By selecting foreground and background colors, users can instantly determine if their color combinations meet accessibility standards, ensuring content is readable for all users, including those with visual impairments. The tool also offers a colorblind simulation feature, allowing users to view their color choices in grayscale to assess visibility for colorblind individuals. This functionality aids in creating inclusive designs that adhere to accessibility best practices. Key Features and Functionality: - Color Contrast Evaluation: Automatically calculates and displays contrast ratios between selected foreground and background colors, indicating pass, margin, or fail statuses based on WCAG standards. - Colorblind Simulation: Provides a grayscale view of color combinations to assess how designs appear to colorblind users, enhancing accessibility considerations. - History and Export Options: Allows users to save multiple color swatches to a history list and export them as a PDF for documentation or sharing purposes. Primary Value and Problem Solved: Contrast Checker addresses the critical need for accessible digital content by enabling designers and developers to ensure their color choices meet WCAG guidelines. By facilitating the creation of designs with sufficient color contrast, the tool enhances readability and usability for individuals with visual impairments, promoting inclusivity and compliance with accessibility standards.