A visualization displays all CSS named colors as stacked horizontal strips, each colored by its RGB hex value. The data loads from a CSV file using `d3.csv`, while React’s `useState` and `useEffect` manage the asynchronous fetch. Each row renders as a fixed-width block with height 4 pixels, creating a full-spectrum bar. The code relies on React DOM and the D3 CSV parser, with both libraries included via CDN in the HTML file.