City ordinance 176874, adopted September 4, 2002, sets the design and what it means. Green stands for "the forests and our green City"; yellow for "agriculture and commerce"; blue for "our rivers". Portland is on the Willamette River near its joining with the Columbia River. City Ordinance 186794, adopted September 3, 2014, updated the proportions and the Pantone color specifications: White, PMS 279 (Blue); PMS 349 (Green); and PMS 1235 (Yellow).