The present invention relates to an azo compound represented by the following formula (1) ##STR00001## (wherein, each of R.sup.1 and R.sup.2 independently represents a hydrogen atom, a halogen atom, a cyano group, a carboxy group, a sulfo group, a sulfamoyl group, an N-alkylaminosulfonyl group, an N-phenylaminosulfonyl group and the like; each of R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 independently represents a hydrogen atom, a halogen atom, a hydroxy group, a cyano group, a carboxy group, a sulfo group, a sulfamoyl group, an N-alkylaminosulfonyl group, an N-phenylaminosulfonyl group and the like; and n represents 0 or 1, respectively)or a salt thereof, an ink composition containing the same, a recording method and a colored article; the ink composition containing said azo compound has superior storage stability for a long period of time; and articles recorded with said ink composition has superior light fastness and ozone gas fastness.