A pigment dispersion comprising a color pigment represented by formula (I) ##STR00001## wherein, R1 is selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, --CF.sub.3, --COOH, --COOCH.sub.3 and ##STR00002## R2, R4 and R5 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, --CF.sub.3, --COOH and --COOCH.sub.3; R3 is selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, --CF.sub.3, --COOH, --COOCH.sub.3, --SO.sub.2NH--C.sub.6H.sub.5, --CONH--C.sub.6H.sub.5, --CONH--C.sub.6H.sub.5--CONH.sub.2 and --CONH.sub.2; R6 and R7 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, --CF.sub.3, --COOH and --COOCH.sub.3, or R6 and R7 represent the necessary atoms to form an imidazolone ring; and a polymeric dispersant having via a linking group covalently linked to its polymeric backbone at least one pending chromophore group which has a molecular weight smaller than 95% of the molecular weight of said color pigment.The pigment dispersion can be advantageously used in inkjet inks.