A range of CSS named colors is displayed as horizontal stripes in a full-width column, each stripe labeled by its color name. The example uses D3's `csv` method to fetch `cssNamedColors.csv`, which provides the color names and their RGB hex values. React manages the application state with hooks like `useState` and `useEffect`, conditionally rendering a loading message before mapping the data to styled `div` elements. This demonstrates integrating D3 data loading with React component rendering.