Water-insoluble colorant dispersion

A method of producing a water-insoluble colorant dispersion, comprising the steps of:

• dissolving at least two kinds of water-insoluble colorant, a base, and a polymer compound in an aprotic water-soluble organic solvent,
• the polymer compound having
• (i) one or more acid groups selected from the group consisting of a carboxylic group, a sulfonic group, a hydroxyl group and
• (ii) a phosphoric group as hydrophilic unit and at least one repeating unit selected from the repeating units represented by the following Formula (1) or (2);
• and
• bringing the dissolved solution obtained in the step above into contact with an aqueous medium so as to generate fine particles of the water-insoluble colorant;
• wherein, R6 to R8 each independently represent a hydrogen atom or a substituent;
• X− is an anion group balancing with the cation electric charge on the nitrogen atom;
• R1 represents a hydrogen atom or a substituent;
• J represents —CO—, —COO—, —CONR10—, —OCO—, or a methylene group, a phenylene group, or —C6H4CO-;
• R10 represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group;
• W represents a single bond or a divalent linking group;
• R9 represents a hydrogen atom or a substituent;
• Q2 represents a group of atoms which is necessary for forming an unsaturated ring together with a carbon atom and a nitrogen atom.