Hex codes are a way to represent colors in digital design using a six-digit combination of numbers and letters. Each hex code starts with a hash symbol (#) followed by three pairs of characters. The first pair represents the red component, the second pair represents green, and the third pair represents blue. For example, the hex code #FF5733 indicates a specific shade of orange. These codes are widely used in web design and graphic design because they provide a precise way to specify colors. By using hex codes, designers can ensure consistency across different platforms and devices. Tools like color pickers often help users find and select the desired hex codes for their projects.