 Ontario's official tartan was designed in 1965 by Rotex Ltd, but not officially adopted by the province until 2000, when MPP for Bruce-Grey-Owen Sound Bill Murdoch introduced the Tartan Act, which received Royal Assent on June 23, 2000.The three shades of green represent Ontario's forests and fields; the red, its natives; the blue, its waters; and the white, the sky.Its International Tartan Index number is 6627.