The present invention relates to a blue dye compound for a color filter which comprises triarylmethane which is represented as below chemical formula 1 or chemical formula 2. A blue resin composition which contains the blue dye compound has a characteristic of excellent solubility to an organic solvent such as propylene glycol methyl ether acetate (PGMEA), excellent miscibility with other pigments and high brightness, and high heat-resisting property, thereby manufacturing a color filter which has an excellent heat-resisting property and brightness.;COPYRIGHT KIPO 2014;[Reference numerals] (AA) penetration ratio;(BB) Example 1;(CC) Example 2;(DD) Example 3;(EE) Example 4;(FF) Comparative example 1;(GG) Comparative example 2
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