To provide a blue pigment dispersion liquid for a color filter capable of having a desired chromaticity by improving visibility in an oblique direction of a blue coloring layer, to provide a blue photosensitive resin composition for a color filter capable of having the desired chromaticity by improving the visibility in the oblique direction of the blue coloring layer, to provide a color filter formed by using the photosensitive resin composition, and to provide a liquid crystal display device having this color filter.

The blue pigment dispersion liquid for the color filter is a pigment dispersion liquid containing at least a pigment, a pigment dispersant and a solvent. The pigment contains at least C.I. Pigment Blue 15:6 and C.I. Pigment Violet 19. The blue photosensitive resin composition for the color filter contains a binder component in a component of the pigment dispersion furthermore.