Resin composition, optical filter, image display device, solid-state imaging element, and colorant mixture

A resin composition comprising:

• a colorant;
• and
• a resin,
• wherein the colorant contains two or more squarylium colorants represented by Formula (1),
• at least one of the squarylium colorants is a squarylium colorant represented by Formula (2), and
• a colorant mixture consisting, of the two or more squarylium colorants, which is included in the resin composition, has a maximum absorption wavelength in a wavelength range of 400 nm to 700 nm,
• in Formula (1), A and B represent an aryl group, a heterocyclic group, or —CH=G, where G represents a heterocyclic group, and
• in Formula (2), A1 represents a heterocyclic group having a hydrogen-bonding group which forms an intramolecular hydrogen bond, B represents an aryl group, a heterocyclic group, or —CH=G, where G represents a heterocyclic group, and a structure of the heterocyclic group of B and a structure of the heterocyclic group of A1 are different from each other.