A colorant multimer comprising, as a partial structure of a colorant moiety, a dipyrromethene metal complex compound or tautomer thereof obtained from: (i) a dipyrromethene compound represented by the following Formula; and (ii) a metal or a metal compound: wherein in Formula, R 4, R 5, R 6, R 7, R 8, R 9, and R 10 each independently represent a hydrogen atom or a monovalent substituent, wherein the colorant multimer comprises at least one of constituent units represented by the following Formula, or: wherein in Formula, X A1 represents a linking group formed by polymerization; L A1 represents a single bond or a divalent linking group; "Dye" represents a colorant residue formed by removing any one to ( m +1) hydrogen atoms from the dipyrromethene metal complex compound or tautomer thereof; XA2 represents a linking group formed by polymerization; L A2 represents a single bond or a divalent linking group; m represents an integer of from 0 to 3; and "Dye" and L A2 may be linked to each other by a covalent bond, an ionic bond or a coordinate bond: wherein in Formula, X B1 represents a linking group formed by polymerization; L B1 represents a single bond or a divalent linking group; A represents a group that can be bonded to "Dye" via an ionic bond or a coordinate bond; "Dye" represents a colorant residue having a group that can be bonded to A, via an ionic bond or a coordinate bond, on a substituent in the dipyrromethene metal complex compound or tautomer thereof; X B2 represents a linking group formed by polymerization; L B2 represents a single bond or a divalent linking group; m represents an integer of from 0 to 3; and "Dye" and L B2 may be linked to each other by a covalent bond, an ionic bond or a coordinate bond: wherein in Formula, L C1 represents a single bond or a divalent linking group; "Dye " represents a colorant residue formed by removing any two of hydrogen atoms from the dipyrromethene metal complex compound or tautomer thereof; and n represents an integer of from 1 to 4. (i) a dipyrromethene compound represented by the following Formula; and (ii) a metal or a metal compound: wherein in Formula, R 4, R 5, R 6, R 7, R 8, R 9, and R 10 each independently represent a hydrogen atom or a monovalent substituent, wherein the colorant multimer comprises at least one of constituent units represented by the following Formula, or: wherein in Formula, X A1 represents a linking group formed by polymerization; L A1 represents a single bond or a divalent linking group; "Dye" represents a colorant residue formed by removing any one to ( m +1) hydrogen atoms from the dipyrromethene metal complex compound or tautomer thereof; XA2 represents a linking group formed by polymerization; L A2 represents a single bond or a divalent linking group; m represents an integer of from 0 to 3; and "Dye" and L A2 may be linked to each other by a covalent bond, an ionic bond or a coordinate bond: wherein in Formula, X B1 represents a linking group formed by polymerization; L B1 represents a single bond or a divalent linking group; A represents a group that can be bonded to "Dye" via an ionic bond or a coordinate bond; "Dye" represents a colorant residue having a group that can be bonded to A, via an ionic bond or a coordinate bond, on a substituent in the dipyrromethene metal complex compound or tautomer thereof; X B2 represents a linking group formed by polymerization; L B2 represents a single bond or a divalent linking group; m represents an integer of from 0 to 3; and "Dye" and L B2 may be linked to each other by a covalent bond, an ionic bond or a coordinate bond: wherein in Formula, L C1 represents a single bond or a divalent linking group; "Dye " represents a colorant residue formed by removing any two of hydrogen atoms from the dipyrromethene metal complex compound or tautomer thereof; and n represents an integer of from 1 to 4.