Black water-based ink composition

A black water-based ink composition, containing:

• at least one type of black dye selected from the group consisting of compounds expressed by the following formula (1) and salts thereof:
• wherein, in (the formula (1), R1 is a phenyl group having a substituent or a naphthyl group having a substituent, R2 is a phenylene group having a substituent or a naphthylene group having a substituent, R3 is a 5- to 7-member heterocyclic group having a substituent and at least one double bond, and the substituents in R1 to R3 are independently selected from the group consisting of OH, SO3H, PO3H2, CO2H, NO2, C1 to C4 alkyl groups, alkyl groups having a substituent, C1 to C4 alkoxy groups, alkoxy groups having a substituent, amino groups having a substituent, and phenyl groups having a substituent),
• and at least one yellow dye and one magenta dye, wherein each of the yellow dye and magenta dye is a compound that has at least one type of group selected from the group consisting of an —SO3H group, —COOH group, —SO3M group, and —COOM group, where M in these groups is an alkali metal atom, has no primary amino group, and is not an ammonium salt or a salt with an organic cation,
• wherein the yellow dye and magenta dye provide the ink composition with a hue that is different than a hue of the black dye.