When two colors are presented under identical viewing conditions, they may appear the same to one observer but different to another, a phenomenon known as observer metamerism (OM). This effect is caused by individual differences in their color matching functions (CMFs). To achieve accurate color reproduction between displays, it is essential to minimize OM. This study first investigated OM between four displays in cross-media reproduction through computer simulations. Next, the relationship between metamerism in the displays and the RGB peak wavelengths was examined. The simulations were also used to explain the effects of individual variation on the orientation of OM ellipses in displays, from the perspective of human visual physiological parameters. The analytical approach developed in this study provides a valuable framework for predicting OM across different display technologies.