All of the currently available fillers and volumizers, including Juvederm Ultra and Ultra Plus, Restylane, Perlane, and Radiesse are absolutely fine for use in African Americans, as well as other people of color. These materials are injected below the epidermis (the uppermost level of the skin that contains the pigment producing cells, melanocytes, responsible for skin pigmentation). As a result there is no interaction between the material and the pigment in our skin and hence no problems in this regard.
Through the years I have used each of these products successfully in many patients of all ethnicities and skin types without any pigmentary problems.
Web reference: http://www.youngerlookingwithoutsurgery.com