A display device is provided. The display device includes a display panel driving unit and a backlight unit. The display panel driving unit generates a data signal to display an image on a display panel of the display device and to output a first light control signal and a second light control signal in response to a mode signal. The backlight unit provides first light having a first color to the display panel in response to the first light control signal and provides second light having a second color to the display panel in response to the second light control signal. The display panel driving unit adjusts a pulse width of the first light control signal or a pulse width of the second light control signal in response to the dimming signal.