To enhance the convenience and accuracy of products’ color reproduction predicted by packaging and printing service providers, on the basis of CIE TC8-05 recommended guidelines and offered gamut comparison index, two new gamut matching characterization metrics including gamut difference index (GDI) and gamut similarity index (GSI) were proposed and tested with developed MATLAB codes. According to target gamuts implemented by standard referred printing conditions and gamut matching preferences, four sets of verified tests exploring the applicability and visualization of above three mentioned metrics in practical gamut matching cases, were conducted by using Convhulln function, Venn function and ICC standard printing data sets including CRPC sets and Fogra sets. According to test results, the applicability and precision of GCI metric combined one of GDI metric and GSI metric, as well as the combination of GDI metric and GSI metric, were better than that of only single GCI metric. Furthermore, the approach and diagram offered by Venn function applied into gamut matching characterization could easily enable general customers to predict and vividly understand the relationship between color reproduction and gamut comparison metric.