This example demonstrates how React can render a dataset of CSS named colors by mapping each row to a colored horizontal strip, creating a stacked visual catalog of 148 color swatches. The application loads the color data using D3’s `d3.csv` method in a `useEffect` hook, stores it in React state via `useState`, and conditionally displays a “Loading…” message until the data arrives. Each color is rendered as a `<div>` element with its background set to the RGB hex value from the CSV. The code combines React 17, D3 v6, and SVG-friendly styling within a single-page setup.