This bar chart visualizes unemployment rates across Spanish regions in 2015, with bars colored in a dark red that deepens on hover to reveal the precise value. Built with D3 v3, the visualization is framed by a clean white background and uses an interactive hover effect—when the pointer passes over a bar, it fills with a rich crimson and the corresponding value label fades in, making it easy to compare regional unemployment data. The chart is part of a larger data exploration tool that includes additional views for scatterplots and line charts, all driven by user-controlled variable selection.