Over the years, Matrix Total Results has provided hair color maintenance with cult favorites including, So Silver (for blondes) and Brass Off (for brunettes). The company has finally completed the at-home toning range for all hair levels with Matrix Total Results Dark Envy.   The collection is the first range that uses green formulas to neutralize red undertones that can emerge in black to dark brown hair colors. It includes a shampoo (blue-yellow direct dyes neutralizes red undertones and add...