This scatter plot of the Iris dataset shows the relationship between petal length and sepal width, with each point colored by species. An interactive color legend on the right allows hovering over a species to highlight its points and fade the others. Built with React and D3 v5, it uses `scaleLinear` for axes, `scaleOrdinal` for colors, and a `ColorLegend` component that triggers hover events to filter and redraw the data.