This bar chart visualizes salary against years of experience, with each bar’s color mapping to its salary value using a sequential blue scale from ColorBrewer, accessed via the colorbrewer.js script. The chart is drawn as an SVG using D3 version 7, with axes and a color legend. The data originates from a CSV file hosted in a GitHub gist, and the legend is generated using the d3-legend library with a formatted label that abbreviates numbers.