This example displays the complete set of CSS named colors as an SVG pie chart, with each slice filled using its corresponding RGB hex value from a CSV dataset loaded via `d3.csv`. The chart is rendered through React components using `useState` and `useEffect` hooks, which fetch the data asynchronously and manage the loading state. A `d3.pie` generator computes the angles for each color, while `d3.arc` creates the path shapes with an outer radius equal to the full chart width. The visualization maps each data row to a slice, demonstrating how React and D3 v5 integrate for data-driven rendering.