This example renders the CSS Named Colours dataset as a vertical stack of horizontal color swatches, one per named color, with each swatch’s background set to its HEX code. The React component uses the `useState` and `useEffect` hooks to load the CSV via `d3.csv` from a GitHub gist, displaying a “Loading…” message until the data arrives. Once loaded, it maps over the rows to produce the colored div elements, demonstrating a simple data-driven rendering workflow with React and D3 v7.