A display device includes a window film with light leak prevention layers that may withstand repeated folding operations. The window film includes a first film having a first surface configured to provide an outermost surface and a second surface, a second film disposed below the first film and having a third surface and a fourth surface, a first color layer disposed on at least one of the second surface and the third surface, and a second color layer disposed below the first color layer and disposed on at least one of the third surface and the fourth surface.