A vertical color legend displays four fruit categories—apple, lemon, lime, and orange—as colored circles, with each fruit’s name placed to the right. The legend is generated using D3 v5’s `scaleOrdinal` for color mapping and a custom `colorLegend` function that binds data to SVG groups, appending circles and text elements with computed spacing and offsets. All shapes are rendered as SVG elements within a 960×500 viewport, with styling defined in an external CSS file.