This choropleth visualizes visa refusal rates by country, using a yellow-or-brown color scale to indicate economic classification rather than refusal counts. The map, rendered as an SVG with a blue sphere background, uses a natural Earth projection and supports zooming. Data is loaded from the World Atlas TopoJSON and TSV files, with each country’s path colored via `d3.scaleOrdinal` and `schemeYlOrBr`. A custom color legend shows the ordinal categories, while hovering highlights a country in red and displays its name and economy type in a tooltip.