A legend example displays categorical color scales using D3 v6’s scaleOrdinal, rendering SVG circles and text labels. Each circle’s fill is mapped directly from the color scale’s domain, while a text offset places labels beside the markers. The colorLegend function accepts a color scale and spacing properties, using selection.merge and enter/update patterns to manage the DOM. Data originates from a hardcoded array of fruit names, with no external dataset loaded.