Four ordinary categorical color swatches form a simple legend for fruit types. Each circle is rendered with a distinct fill from an ordinal color scale, and its label appears below it. The example demonstrates how to build a reusable legend component by binding the color scale’s domain to SVG circles and text elements. It uses D3’s `select`, `scaleOrdinal`, and the custom `colorLegend` function to position groups horizontally and update them reactively.