Eurekas are items in Infinity Nikki that can be used to decorate Nikki's head, hands, and feet. Upon obtaining a Eureka, fans will discover that it has a certain color, and they may want to change that color in order to match the item to a particular outfit. The process of changing the color of a Eureka in Infinity Nikki can be a bit confusing, though, and this guide is here to elaborate upon how this system works.