This bar chart visualizes the number of non-taxi passenger cars in the Netherlands by primary color, using RDW open data. It shows counts for white, black, gray, blue, red, and green vehicles. The chart uses D3 v5 with `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to render an SVG bar chart. Data is fetched as JSON from the RDW API, filtered for vehicles with taxi indicator "Nee", and aggregated by the `eerste_kleur` field.