This example displays a vertical stacked bar chart of CSS named colors, with each color rendered as a thin horizontal strip. The visualization loads a CSV dataset of named CSS colors from a remote URL using D3’s `csv` utility, then stores the parsed data in React state via the `useState` and `useEffect` hooks. Once loaded, the app maps each color record to a React `<div>` element, setting its background color from the `RGB hex value` column and fixing its dimensions to create the stacked effect. The code combines React 16.9 for component rendering and state management with D3 v5 for data fetching and parsing.