This image is from Elle Decor and has been floating around the internet for a while, but its definitely worthy of another look.
via Elle Decor
The trick here? Red frames! What a great way to add some color and interest to an otherwise bland hallway. Notice that all the frames match, but are different sizes and are hung a bit haphazardly for a more casual feel. The red frames are paired with black and white photographs, which keeps the composition from becoming overwhelming (color photos and colored frames might feel a bit chaotic). This idea could be re-created with any paint color and in any space!