This example displays all CSS named colors as horizontal stacked bars, with each color’s row showing its RGB hex value as the background. It uses React hooks (useState, useEffect, useCallback) to manage asynchronous state, while D3’s csv() function loads color data from a gist-hosted CSV file. The rendering approach maps each data row to a div element, dynamically setting its backgroundColor style from the parsed hex value, with a “Loading…” placeholder shown before data arrives.