Here's a selection of perennial flowers for shade, most of them selected to be native to your area and providing "splashes of color":
columbine, astilbe (showy flower plumes in white, pink, and some brilliant reds), jack-in-the pulpit (not showy or colorful and a spring ephemeral that disappears after awhile, but a fascinating flower and one of our beloved native woodland spring wildflowers) wild ginger (also not showy or colorful, but spreads to make a very rich looking green carpet groundcover)
hardy geraniums (not the red "geraniums" which are actually pelargonium, but the true geranium/cranesbill), coral bells (these come with many colors of gorgeous purple, bronze etc foliage and are often grown more for foliage than flower) , cardinal flower (tall, brilliant red flowers that hummingbirds love), great blue lobelia, wood lily, obedient plant, scarlet sage (salvia coccinea a perennial sage that grows in shade, another red hummingbird plant), celandine poppy/ yellow wood poppy (I have a lot of this and I love it, native woodland plant that gets covered with brilliant golden yellow flowers in spring and then pops out a few here and there through the season, readily reseeds itself and pops up in new places, but isn't aggressive) red trillium (another spring ephemeral)
Selected from the native plant data base at the Lady Bird Johnson Wildflower Center https://www.wildflower.org/plants/ Some of these a good local nursery would have, some you might have to order on line.
I like impatiens too. They are fast and easy, low maintenance and they pump out color all season. But they are annuals so you have to start them over every spring.