A full-color display arrangement for an organic light emitting diode (OLED) device, the full-color display arrangement comprising: a first emissive layer comprising a first blue first organic emissive material, and wherein the first blue first emissive material comprises a light blue phosphorescent material; a second emissive layer disposed in a stack with the first emissive layer and comprising a second organic emissive material, wherein the second organic emissive material comprises a second blue organic emissive material having a peak wavelength at least 4 nm different than the peak wavelength of the first blue organic emissive material, and wherein the second blue emissive material comprises a deep blue fluorescent material; a first color-altering component disposed in the stack with the first and second emissive layers; a second color-altering component configured to produce a different color than the first color-altering component; a first down-conversion layer ; a second down-conversion layer of a different emission color than the first down-conversion layer; wherein each color-altering component and down-conversion layer is disposed in the stack with the first and second emissive layers; wherein the first color-altering component and the first down-conversion layer are configured to convert blue light to green light; wherein the second color-altering component and the second down-conversion layer are configured to convert blue light to red light; wherein the full-color display arrangement comprises emissive materials of only two distinct RGB colors chosen from red, green and blue primary colors, wherein light blue and deep blue are the same distinct RGB color of blue. a first emissive layer comprising a first blue first organic emissive material, and wherein the first blue first emissive material comprises a light blue phosphorescent material; a second emissive layer disposed in a stack with the first emissive layer and comprising a second organic emissive material, wherein the second organic emissive material comprises a second blue organic emissive material having a peak wavelength at least 4 nm different than the peak wavelength of the first blue organic emissive material, and wherein the second blue emissive material comprises a deep blue fluorescent material; a first color-altering component disposed in the stack with the first and second emissive layers; a second color-altering component configured to produce a different color than the first color-altering component; a first down-conversion layer ; a second down-conversion layer of a different emission color than the first down-conversion layer; wherein each color-altering component and down-conversion layer is disposed in the stack with the first and second emissive layers; wherein the first color-altering component and the first down-conversion layer are configured to convert blue light to green light; wherein the second color-altering component and the second down-conversion layer are configured to convert blue light to red light; wherein the full-color display arrangement comprises emissive materials of only two distinct RGB colors chosen from red, green and blue primary colors, wherein light blue and deep blue are the same distinct RGB color of blue. <EOS>