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.