Joico Verocolor Hair Color is the only haircolor in the world that uses the reconstructive qualities of K-PAK Deep-Penetrating Reconstructor, Joico’s world-renowned hair reconstructor, in its formula. Use the Joico Hair Color Chart above to choose the correct color swatch. K-Pak’s properties in VeroColor result in the richest, longest-lasting color, with unprecedented condition and shine. The benefits of K-PAK in VeroColor are apparent immediately.