A React application renders a series of colored horizontal bars, one for each CSS named color, by fetching a CSV file of color names and their HEX values with D3's `csv` utility. The `useState` hook stores this data, and after an asynchronous `useEffect` call completes, a loading message is replaced by an array of `div` elements, each styled with its corresponding HEX value as the background color. This demonstrates using React's state management to drive SVG-less HTML rendering of tabular data.