Polycarbonate blends with a combination of high thin wall flame retardance, CTI Class 2 tracking resistance, and good dimensional stability are disclosed. The blends are a combination of a polycarbonate polymer, a polycarbonate-polysiloxane copolymer, a copolymer of bisphenol-A and a phthalimidine, titanium dioxide, and a phosphorus-containing flame retardant. The polycarbonate blends may be used in various applications.