This is the CodeSystem that contains all the codes in IEC 61966-2-1: Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB (http://terminology.hl7.org/CodeSystem/IECColourManagement) and IEC 61966-2-1: Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB (http://terminology.hl7.org/CodeSystem/IECColourManagement). E.g. what you have to deal with if you get resources containing codes in either of them