This document provides guidelines and a procedure to generate a multicolour characterization dataset. Specifications for colour printing with CMYK + Orange, Green, and Violet are presented. Also, this document provides a recommendation on CMYKOGV ink pigment selections to produce an optimum colour gamut for specific printing processes or use cases. The recommended CMYKOGV ink pigment selections might not be suitable or available for all printing or digital processes or use cases. The procedure in this document is also applicable for CMYK plus any subset of O, G or V.