This visualization displays all 148 named CSS colors from the MDN dataset as a circular pie chart, with each slice filled by its corresponding hex value. Built with React and D3 v5, the code uses the `pie` and `arc` functions from the d3 library to calculate slice angles and render SVG paths, automatically assigning equal angles to each color. The `csv` function fetches the color data from a GitHub Gist, and React's `useState` and `useEffect` hooks manage the asynchronous loading.