A cooking appliance comprises a cabinet and a cooking unit provided in the cabinet and configured to perform cooking of food using a heat source. The cooking appliance also includes a display device configured to display cooking information for the cooking unit. The display device includes a display module configured to irradiate light of a first color to display information for a user and a circuit board arranged at a rear of the display module and configured to control the display module and supply power to the display module. The display device also includes a color conversion filter arranged at a front of the display module and configured to convert the light of the first color irradiated from the display module to light of a second color. The cooking appliance converts the color of light irradiated from the display module to a desired color by using the color conversion filter.