Blue photoresistance composition and colorful optical filter

The invention relates to a blue photoresistance composition and a colorful optical filter. The blue photoresistance composition comprises the following components in parts by weight: 100 parts of alkali soluble resin, 100 parts of optical active compound, 10 parts of photoinitiator, 200 parts of organic solvent and 50 parts of blue pigment dispersion, wherein the optical active compound contains aliphatic acrylate oligomers with the number of functional groups being more than 4, and/or aliphatic acrylate monomers and compounds containing olefin double bond. The blue pattern photoresistance layer of the colorful optical filter contains the blue photoresistance composition. By the invention, the xanthochromia of the optical active compound can be reduced, color difference of the blue photoresistance layer is reduced, flatness and no residue of the surface of a membrane layer are ensured, and the production requirement is finally met.