Green and white striped walls

Photo: Aimee Herring

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Bright greens can be an instant mood lifter, but they can also be a little, well, Kermit the Frog–ish. If you're afraid the color will be too intense for your room, try painting only the bottom third of the wall. For a fun flourish, outline a doorway—or just the top third of it, like this entryway—as well.