A display device is capable of improving image quality including: a first and second substrate; a first and second color layer adjacent to each other between the first and second substrate, and arranged along a first direction; a third color layer including a first divided color layer adjacent to the first color layer in a second direction and a second divided color layer adjacent to the first divided color layer the first direction and adjacent to the second color layer in the second direction; a light blocking layer including a light blocking portion between the first and second color layer and a light blocking portion between the first and second divided color layer. The first, second and third color layer emit lights of different colors and at least two of them have different sizes. A width of the first and second light blocking portion is substantially equal.