The present invention provides organic compounds which improve the light resistance of organic dye compounds without substantially deteriorating their preferable light properties when applied to them, and have satisfactory solubility in organic solvents and compatibility with organic dye compounds. The object of the present invention is solved by formazan metal compounds which comprise specific formazan compounds as ligands; process thereof; light-resistant improvers, optical recording media, and light absorbents, which all comprise the formazan metal complexes; and formazan compounds as intermediates for producing the formazan metal complexes