ISO 11664-2:2007 comprises ISO 10526:2007 and ISO 10526:2007/Cor.1:2008. Its technical content is identical to that of ISO 10526:2007. ISO 10526:2007/Cor.1:2008 changes the reference number of the standard from 10526 to 11664-2.
ISO 11664-2:2007 specifies two illuminants for use in colorimetry. The illuminants are the CIE standard illuminant A and the CIE standard illuminant D65.