A display device is provided. The display device includes: a display substrate on which a plurality of light-emitting areas are defined; and a color conversion substrate on which a plurality of light-transmitting areas respectively associated with the plurality of light-emitting areas and light-blocking areas between the plurality of light-transmitting areas are defined, the color conversion substrate comprising color patterns in the light-blocking areas, and light-blocking members on the color patterns, wherein at least one of the light-emitting areas has an area smaller than the area of the light-transmitting area that overlaps it in a thickness direction, and the color patterns include a blue colorant.