Colloidal crystals only reflect light having a specific wavelength in incident light by Bragg diffraction. In this paper, we propose a method to colorize a reflective display using a structural color filter made by photonic colloidal crystals colorize a black and white reflective display. We fabricated a structural color filter, which made of crystallized polystyrene colloids, by evaporation on a glass slide. We analyzed the crystal structure of color filter by SEM images and evaluated the optical properties by measuring reflection spectra of the crystal, which is placed on a white or black substrate. We demonstrated the feasibility of the colorization of reflective displays.