Swiss chard comes in different colors. 'Ruby Red' have bright red stems and reddish-green, crinkly green leaves. All varieties of Swiss chard are good from a nutritional standpoint, being high in vitamins including vitamin A. Use Swiss Chard as a replacement for Spinach.
Those chard stalks offer a double delight for the greens grower, by the way. Cut the stalk and thick mid-rib out of the leaves for two entirely different vegetables from the same plant: Cook up the leaves using your favorite greens recipes and prepare the stems as you would asparagus or braised celery. Zones 3-10