Abstract: An at-home hair dyeing system, and associated method, configured to supply a user with a customized product for a hair dyeing process, the system including an outer package and a plurality of subpackages reversibly disposed in the outer packaging, each subpackage of the plurality of subpackages being directed to a distinct step in the hair dyeing process and including one or more components associated with the distinct step, where each subpackage includes a connection mechanism for reversibly connecting to one or more adjacent subpackages, preferably by a tab and slot connection, where only one of said subpackages can be held by a unique another subpackage in order, and where a primary subpackage of the plurality of subpackages includes a developer and a colorant or a dye, the developer and the colorant or the dye being selected by or based on the preference of the user.