This choropleth map of U.S. states displays a custom crime-rate index, with darker blue fills representing higher values and gray indicating missing data. State labels and a gradient legend with an axis clarify the quantitative scale. Built with D3 v7 and TopoJSON, the visualization loads US Atlas states-10m data, applies a geoAlbersUsa projection via d3.geoPath, and maps values through a d3.scaleSequential with an interpolateBlues interpolator. Hover interactions highlight state boundaries, and tooltips are provided through SVG title elements.