adobe rgb color space adobe wide gamut rgb color space austria cmyk color model cambridge chromaticity color color model color space coloroid hexachrome international color consortium international electrotechnical commission international organization for standardization josa lms color space light lighting list of color spaces and their uses munsell color system ntsc natural color system osa-ucs optical society of america pal pantone prophoto rgb color space rgb color model rgb color space ryb color model secam srgb scrgb color space standard illuminant united kingdom vienna xvycc ycbcr ydbdr yiq ypbpr yuv