Disclosed is a display device with a driving method thereof. The display device includes a plurality of gate lines, a plurality of data lines crossing the gate lines for transmitting gray voltages corresponding to image data among a plurality of the gray voltages as data voltages, and a plurality of pixels connected to the gate and the data lines for receiving the data voltages. The pixels include first color pixels, second color pixels, and third color pixels. The first color pixels express a maximum luminance upon application of a first voltage having the maximum value among the gray voltages, and the second and the third color pixels express a maximum luminance upon application of second and third voltages less than the first voltage among the gray voltages.