Green Photoresist and Color Filter Substrate using the same

A color filter substrate, comprising a substrate, a plurality of red photoresists, a plurality of blue photoresists and a plurality of green photoresists, wherein the red photoresists, the blue photoresists and the green photoresists are disposed on the substrate, GY×Gy is greater than 33 when the green photoresist is tested by a standard C light source and Gy is greater than or equal to 0.6, a light beam from the standard C light source after passing through the green photoresist corresponds to a y coordinate in a CIE 1931 chromaticity diagram and Gy represents the y coordinate, and GY represents light transmittance of the green photoresist for the light beam from the standard C light source.