Mars Inc. is going green for Valentine’s Day. Its iconic M&Ms candy will appear with striking green-themed graphics in a promotional version starting next January. The graphics center on “Ms. Green,” a vampish anthropomorphized  M&M’s piece introduced in 1997. The 8- and 14-ounce pouches will contain all green M&M’s. Mars is betting that the almost-all-green packages will stand out among the sea of pink and red in Valentine’s-related displays.