Copper phthalocyanine pigment composition and ink composition containing same

A copper phthalocyanine pigment composition comprising:

• a copper phthalocyanine pigment;
• a copper phthalocyanine sulfonic acid derivative represented by general formula (I),
• [in the formula, n represents an average number of substituents of 0.5 to 1.5];
• a copper phthalocyanine derivative represented by general formula (II),
• [in the formula, R1 represents a C1-C20 alkyl group, and n represents an average number of substituents of 0.5 to 1.5];
• and
• a copper phthalocyanine derivative represented by general formula (III),
• [in the formula, R2, R3, R4, and R5 each independently represent a C1-C20 alkyl group, at least one of R2, R3, R4, and R5 is a C6-C2G alkyl group, and n represents an average number of substituents of 0.5 to 1.5],
• wherein the content of the copper phthalocyanine sulfonic acid derivative represented by the general formula (I) is 2% by mass or more and 4% by mass or less in the entire pigment composition, the content of the copper phthalocyanine derivative represented by the general formula (II) is 5% by mass or more and 6% by mass or less in the entire pigment composition, and the content of the copper phthalocyanine derivative represented by the general formula (III) is 0.5% by mass or more and 5% by mass or less in the entire pigment composition.