Thanks for writing. There's a very wide range of shade-loving perennials that should thrive in your climate and give you color from spring to fall. Check out a wonderful selection at http://www.bhg.com/gardening/flowers/perennials/the-best-perennials-for-shade/
Or, peruse our Plant Encyclopedia (link above, at the top left corner of your screen) and do a search for shade-loving plants for your Zone.
---Justin, Senior Garden Editor, BHG.com