According to one embodiment, a display device includes a unit pixel including a first sub-pixel displaying a first color having a first hue, a second sub-pixel displaying a second color having a first hue, a third sub-pixel displaying a first color having a third hue, and a fourth sub-pixel displaying a second color having a fourth hue. The fourth hue corresponds to a point inside a triangle defined by three points corresponding to the first hue, the second hue, and the third hue. Luminance of the fourth sub-pixel is increased without increasing luminance of the third sub-pixel after luminance of the first sub-pixel reaches predetermined luminance.