What is the key to designing sites that are accessible to people who are color blind?

The key to designing accessible sites for people who are color blind is to use high contrast between text and background colors, ensuring readability without relying solely on color to convey information. Incorporating patterns, textures, or labels in addition to color allows users to differentiate elements effectively. Additionally, using color combinations that are color-blind friendly, such as avoiding red-green combinations, enhances accessibility for all users. Testing designs with accessibility tools and involving users with color blindness in the design process can further improve inclusivity.