Contrast Ratio is a company dedicated to digital accessibility, providing resources and tools to help ensure online content is accessible to everyone, including those with visual impairments. Their website, http://www.contrastratio.net, offers an array of services and information aimed at improving color contrast in web design, which is crucial for readability and usability according to accessibility standards like WCAG (Web Content Accessibility Guidelines). The site may include contrast checker tools, guidelines, and best practices for designers and developers committed to creating more inclusive digital environments.