A pie chart displays the CSS named colors as equal-sized slices, each filled with its corresponding RGB hex value. The visualization loads color data from a CSV gist using `d3.csv` and renders slices with `d3.pie()` and `d3.arc()` inside a React component. The chart uses React hooks for state management and renders SVG paths within a centered group, with D3 v6 handling the data-to-geometry transformation.