The variation in grape color is due to the genes responsible for the synthesis of red pigments (anthocyanins.) Through these variations, the varieties Pinot blanc and Pinot gris arose from Pinot noir.

All grape colors have similar nutrient profiles, offering fiber, potassium, vitamin A, and antioxidants—though purple grapes have slightly more antioxidants than red or green. Flavor and texture vary ...

Napa’s grapes today are at a turning point in their growth cycles as they ripen and enter the home stretch to harvest. Varietals across the valley have begun to take on their telltale change of hues — ...