This example visualizes CSS named colors as a stacked sequence of horizontal bars, with each bar’s background color set to its corresponding RGB hex value. The data loads from a CSV file using D3’s `d3.csv` utility, while React’s `useState` and `useEffect` hooks manage the loading state and trigger the asynchronous fetch. Once the data arrives, React maps each row to a `<div>` element, setting its inline style for `backgroundColor`, width, and height. The page displays a “Loading…” message until the dataset is fully parsed.