A novel compound having sufficiently high fastness to light, heat, humidity and active gas in the environment and a coloring composition using the compound, particularly, an ink for ink jet recording, an ink jet recording method and a method for improving the preservability of formed image, which can form an image having high fastness to light and ozone gas in the environment. A phthalocyanine dye mixture having a specific structure and an ink, an ink for ink jet recording, an ink jet recording method and a method for improving the preservability of formed image, using the phthalocyanine dye mixture.