Polymerizable composition, color filter, method of producing color filter and solid-state image sensor

A polymerizable composition comprising (A) a photoradical polymerization initiator represented by following Formula (1), the photoradical polymerization initiator having a molar absorption coefficient with respect to light at a wavelength of 365 nm in ethyl acetate of from 4,000 to less than 10,000;

• (B) a polymerizable compound;
• and (C) a colorant:
• wherein, in Formula (1), X represents CH2, O or S;
• R1 represents a halogen atom, a nitro group, a cyano group, or a substituent represented by following Formula (2), Formula (3) or Formula (4);
• R2 represents an alkyl group, an aryl group, a heteroaryl group, an alkoxy group, an aryloxy group or a heteroaryloxy group;
• R3 represents a hydrogen atom or an alkyl group having at least one substituent selected from the group consisting of a cyano group, an alkenyl group, an alkynyl group, —SRa, —CONRaRb, —OC(O)NRaRb, —OC(O)Ra, —C(O)ORa, —S(O)Ra and —S(O)2Ra, wherein Ra and Rb each independently represent a hydrogen atom, an alkyl group, an aryl group or a heteroaryl group:
• wherein, in Formulae (2) to (4), R4 represents an alkyl group, an aryl group, a heteroaryl group, a hydroxyl group, an alkoxy group, an aryloxy group, a heteroaryloxy group or an amino group.