So plant wise, look for ones that keep their color in winter. Ask your local nursery for help. Hostas are great for shade and come in lots of colors and virtually no maintenance. You could had some trellis planters across the back and paint a color. Planter boxes on the deck. An outdoor rug and colorful cushions.

Emerald and gold Euonymous keep their color all winter and will climb fences for added color.