Experts say a single daily serving of spinach has enough chlorophyll to substantially cut the risk from many cancer causing substances that may sneak into the diet. The darker the vegetable, the more chlorophyll it contains so go for the green. Blue/purple is the color of concord Grapes, of course deeply dyed with the pigment anthocyanin in fact, there are many different form of anthocyanins, with a palette that ranges from pale red to the deep purple of blackberries.