This example displays the CSS named colors from a CSV file as a vertical stack of horizontal color bars. It uses React with hooks (`useState`, `useEffect`, `useCallback`) to load data asynchronously via d3.csv and render each row as a styled div. The background color of each bar comes from the `RGB hex value` column, with fixed width and height. ReactDOM renders the App component into the document root, and d3 v7 handles the CSV parsing.