This example shows the 148 named CSS colors as a donut chart, with each color’s slice filled by its corresponding RGB hex value. It loads the CSV data from a GitHub gist using D3’s `csv` utility, then computes the pie layout with `d3.pie` and `d3.arc`. React’s `useState` and `useEffect` hooks manage the asynchronous data loading and hold the fetched rows, which are then mapped to SVG `<path>` elements within a React-rendered `<svg>` container. The visualization highlights the integration of D3’s data-processing functions with React’s declarative rendering model.