This example displays the CSS named color palette as a full-screen stack of horizontal color bands, one per row. It loads a CSV of color names and hex values using D3’s `d3.csv`, stores the result in React state via `useState` and `useEffect`, and renders each row as a `div` with a background color set from the `RGB hex value` field. React 16.9 manages the conditional loading state, while D3 v7 handles the data fetching.