This example renders a pie chart of CSS color names using React and D3, with each slice filled by the corresponding hexadecimal RGB value from a CSV dataset. The visualization shows the full distribution of named colors, with slices arranged around a center point at a fixed width and height. React manages the component state and asynchronous data loading, while D3’s `pie` and `arc` functions compute the geometry and generate SVG path elements. The SVG output is rendered directly through React’s declarative JSX syntax.