A pie chart displays all CSS named colors as equal-sized slices, each filled with its corresponding RGB hex value from a CSV dataset loaded via D3's `csv` utility. The React component uses `useState` and `useEffect` to fetch and store the data, then renders the SVG paths with D3's `pie` and `arc` generators. React's declarative JSX maps each slice to a `<path>` element, while D3 handles the geometric calculations for the circular layout.