Optical film, display device, and composition for forming colored layer

A composition for forming a colored layer, the composition comprising:

• an active energy ray-curable resin;
• a photoinitiator;
• a colorant;
• an additive;
• and
• a solvent, wherein
• the colorant comprises:
• (A) a first coloring material that is a pyrromethene cobalt complex dye having a maximum absorption wavelength in a range of 470 to 530 nm and an absorption spectrum half width of 15 to 26 nm, and
• (B) at least one of
• a second coloring material having a maximum absorption wavelength in a range of 560 to 620 nm and an absorption spectrum half width of 15 to 55 nm, and
• a third coloring material in which a wavelength having the lowest transmittance in a wavelength range of 400 to 800 nm is in a range of 650 to 800 nm, the colorant includes absorption wavelength bands one of which has a transmittance of 1% or higher and less than 50%, and
• the colorant includes, as an additive, one or more of a radical scavenger, a peroxide decomposer, and a singlet oxygen quencher.

An optical film, comprising:

• a sheet-like substrate having an ultraviolet shielding rate of 85% or higher according to JIS L 1925, the substrate having a first surface and a second surface opposite the first surface, the substrate consists a material selected from the group consisting of polymethylmethacrylate (PMMA), triacetylcellulose (TAC) and polyethylene terephthalate (PET);
• an optical function layer formed to face the first surface of the substrate;
• and
• a colored layer formed to face the second surface of the substrate and including a colorant, wherein
• a difference ΔE*ab between chromaticities before and after a lightfastness test in which the optical film is irradiated with a xenon lamp with an illuminance of 60 W/cm2 at a wavelength of 300 to 400 nm for 120 hours under conditions including a temperature of 45° C. and a humidity of 50% RH satisfies following Expression (1):
• ΔE*ab≤5 Expression (1),
• the colorant included in the colored layer includes at least one of
• a first coloring material having a maximum absorption wavelength in a range of 470 to 530 nm and an absorption spectrum half width of 15 to 45 nm,
• a second coloring material having a maximum absorption wavelength in a range of 560 to 620 nm and an absorption spectrum half width of 15 to 55 nm, and
• a third coloring material in which a wavelength having the lowest transmittance in a wavelength range of 400 to 800 nm is in a range of 650 to 800 nm, and
• the colorant includes absorption wavelength bands one of which has a transmittance of 1% or higher and less than 50%.