The visualization renders a vertical stack of colored horizontal bars, one per entry in a dataset of CSS color names and their hex values. It demonstrates data loading with `d3.csv` from a GitHub gist, followed by React state management via `useState` and `useEffect`. Each row is a `<div>` whose background color is set to the parsed `RGB hex значение` field, with fixed width and height, creating a continuous spectrum. The example shows asynchronous data fetching with a simple loading state and maps the data directly to styled React elements.