category_color = d3.scaleOrdinal()
.domain(industries)
.range(['#866f98', '#44aa99', '#117733', '#444047', '#ddcc77', '#999933', '#332288', '#882255', '#aa4499', '#ee8866', '#ffaabb', '#4477aa', '#d55e00', '#cc79a7', '#84773a', '#918b73', '#88ccee'])