This example shows a donut chart of CSS named colors, where each color is represented by a wedge filled with its own RGB hex value. The visualization loads color data from a CSV file using D3’s `csv` utility and manages the asynchronous data with React’s `useState` and `useEffect` hooks. Each wedge is rendered as an SVG `path` computed with D3’s `arc` generator, using angles proportional to the data index. The chart appears inside a React component that displays a loading message until the data arrives.