A delicate color shows up almost white in the strong light of summer. I'll add some more intense colors with them next year. There are many seeds sprouting underneath the plants. I hope some wait till next spring. Not only are they pretty in the garden but, alkaloids extracted from Catharanthus roseus/Madagascar periwinkle are used in pharmaceuticals to treat leukemia. Of course, you would not concoct your own brew. They are poisonous.