OLED display has many excellent points comparing the legacy LCD. The main good feature is the image quality. The wider gamut, real black and higher contrast ratio feature make the OLED display the best option for image quality. However, due to this wider gamut feature, OLED display color feature could not be optimal to the standard color, in example, sRGB or AdobeRGB. To make the best color feature in OLED display with standard color contents, Gamut Mapping Algorithm for OLED Display should be developed and applied. In this paper, the method and experimental result for this will be introduced.