This example displays a vertical stack of colored horizontal bars, one for each named CSS color, loaded from a CSV file. Using React with hooks like `useState` and `useEffect`, the app asynchronously fetches the data via `d3.csv` and renders each row as a div with a background color set from the `RGB hex value` column. While the data is loading, a “Loading...” message appears, and the final visualization fills the viewport with sequential color swatches.