While there are many color combinations that work well with blue painted walls, pairing them with green curtains creates a calming atmosphere in a bedroom or living room. Orange curtains and blue walls provide excitement, as these complementary colors are opposite each other on the color wheel.
When decorating with blue, consider this color within the environment, as in the sky or the sea. Blue in nature is contrasted with golden sand, white pebbles, various shades of greens and gray cliffs. A monochromatic color scheme with different values of blue or analogous colors is another interesting way to decorate a room.