An organic light emitting diode comprising: - a first electrode configured to function as an anode, wherein the first electrode is a transparent electrode or a transflective electrode; - a second electrode, wherein the second electrode is a reflective electrode; and - an organic layer (200, 400, 600) between the first electrode and the second electrode to emit white light, wherein the organic layer (200, 400, 600) is configured to emit white light in which an X-axis coordinate value in a CIE color coordinate system is equal to or greater than 0.29, a Y-axis coordinate value in the CIE color coordinate system is in a range of 0.32 to 0.45, and the Y-axis coordinate value in the CIE color coordinate system is equal to or greater than the X-axis coordinate value in the CIE color coordinate system, wherein the organic layer includes: a first light-emitting portion on the first electrode, the first light-emitting portion including a first light-emitting layer; a second light-emitting portion on the first light-emitting portion, the second light-emitting portion including a second light-emitting layer; and a third light-emitting portion on the second light-emitting portion, the third light-emitting portion including a third light-emitting layer, wherein the first light-emitting portion on the first electrode emits blue light, the second light-emitting portion on the first light-emitting portion emits yellow-green light, and the third light-emitting portion on the second light-emitting portion emits blue light, wherein the second light-emitting portion includes a lower light-emitting layer and an upper light-emitting layer, and the lower light-emitting layer is closer to the first electrode than the upper light-emitting layer, and wherein the lower light-emitting layer and the upper light-emitting layer are configured to emit yellow-green light and a concentration of a dopant with which the lower light-emitting layer is doped is greater than a concentration of a dopant with which the upper light-emitting layer is doped. - a first electrode configured to function as an anode, wherein the first electrode is a transparent electrode or a transflective electrode; - a second electrode, wherein the second electrode is a reflective electrode; and - an organic layer (200, 400, 600) between the first electrode and the second electrode to emit white light, wherein the organic layer (200, 400, 600) is configured to emit white light in which an X-axis coordinate value in a CIE color coordinate system is equal to or greater than 0.29, a Y-axis coordinate value in the CIE color coordinate system is in a range of 0.32 to 0.45, and the Y-axis coordinate value in the CIE color coordinate system is equal to or greater than the X-axis coordinate value in the CIE color coordinate system, wherein the organic layer includes: a first light-emitting portion on the first electrode, the first light-emitting portion including a first light-emitting layer; a second light-emitting portion on the first light-emitting portion, the second light-emitting portion including a second light-emitting layer; and a third light-emitting portion on the second light-emitting portion, the third light-emitting portion including a third light-emitting layer, wherein the first light-emitting portion on the first electrode emits blue light, the second light-emitting portion on the first light-emitting portion emits yellow-green light, and the third light-emitting portion on the second light-emitting portion emits blue light, wherein the second light-emitting portion includes a lower light-emitting layer and an upper light-emitting layer, and the lower light-emitting layer is closer to the first electrode than the upper light-emitting layer, and wherein the lower light-emitting layer and the upper light-emitting layer are configured to emit yellow-green light and a concentration of a dopant with which the lower light-emitting layer is doped is greater than a concentration of a dopant with which the upper light-emitting layer is doped. a first light-emitting portion on the first electrode, the first light-emitting portion including a first light-emitting layer; a second light-emitting portion on the first light-emitting portion, the second light-emitting portion including a second light-emitting layer; and a third light-emitting portion on the second light-emitting portion, the third light-emitting portion including a third light-emitting layer, wherein the first light-emitting portion on the first electrode emits blue light, the second light-emitting portion on the first light-emitting portion emits yellow-green light, and the third light-emitting portion on the second light-emitting portion emits blue light, wherein the second light-emitting portion includes a lower light-emitting layer and an upper light-emitting layer, and the lower light-emitting layer is closer to the first electrode than the upper light-emitting layer, and wherein the lower light-emitting layer and the upper light-emitting layer are configured to emit yellow-green light and a concentration of a dopant with which the lower light-emitting layer is doped is greater than a concentration of a dopant with which the upper light-emitting layer is doped.