Many hostas have purplish flowers but I’m unaware of any with purple leaves. Other shade perennials incluse pulmonaria, hellebore, cimicifuga, ginger, physostegia, meadow rue, bleeding heart and many others. Here’s a link that provides a good list: https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-5/zone-5-shade-plants.htm