The idea of purple toothpaste is that it uses color theory to make your smile appear whiter. The purple shade is meant to ...

PopWhite is a two-part system that includes a primer (toothpaste) and a toner (mouthwash). The combo will leave your mouth feeling refreshed and clean, but the power is in the purple color.

“Purple toothpaste takes advantage of the color theory — complementary colors [like purple and yellow] on the color wheel cancel each other out.” This can create the optical illusion of ...