A full color display panel comprises an organic light-emitting area, a spectrum-modulation layer, a color-separating layer and a transparent substrate. In this case, the organic light-emitting area includes a plurality of pixels for emitting white light. The spectrum-modulation layer is doped with a fluorescent material and/or a phosphorescent material in a transparent protecting medium. The color-separating layer includes a light-shielding frame and a plurality of color filters. The light-shielding frame is disposed around the peripheral of the color filters. The color-separating layer is disposed on the transparent substrate. The spectrum-modulation layer is disposed above the color-separating layer. The organic light-emitting area is disposed above the spectrum-modulation layer.