Delphinidin

Delphinidin is an anthocyanidin, a primary plant pigment, and also an antioxidant. Delphinidin gives blue hues to flowers like violas and delphiniums. It also gives the blue-red color of the grape that produces Cabernet Sauvignon, and can be found in cranberries and Concord grapes as well as pomegranates.

Delphinidin, like nearly all other anthocyanidins, is pH-sensitive, and changes from blue in basic solution to red in acidic solution.