This example uses React with D3 v7 to render a pie chart from a CSV file of CSS named colors. The visualization displays each color as a pie slice, with the fill color taken directly from the RGB hex value in the data. The app loads the CSV using `d3.csv`, then employs the `d3.pie` layout and `d3.arc` generator to compute and draw the SVG paths. The chart is centered via a transform, with inner and outer radii set to create a donut effect.