A custom color TreeMap visualizes US steel scrap exports, showing the hierarchy of partner countries (Canada, India, South Korea, Mexico, Pakistan, Taiwan, Thailand, Turkey) and the value of each commodity shipped. The treemap uses nested rectangles sized by the total export value per country, with a dark blue to light blue sequential color scale encoding magnitude. The visualization, built with d3.treemap and d3.hierarchy, supports drill-down by clicking a country's cell to explore its commodity breakdown. A reset button restores the root view, and transitions animate changes when drilling down or resetting.