Moving into a temporary space like a dorm room or apartment doesn’t mean that you have to leave your personality behind. It also doesn’t mean that you have to decorate with hand-me downs from Dear Aunt Sally. You can still remake the space with inexpensive finds from Walmart, Target, or even the neighborhood garage sale.
Most temporary places, including dorm rooms, don’t allow you to paint your walls. But, this doesn’t mean that you have to give up all hope of ever seeing color again. Find colors in paintings, photographs, posters, etc., that complement the colors in your space. This way, while it won’t completely mask your walls, the additions won’t stand out like a sore thumb either.
Also, think about using posters instead of small pictures. The effect will be more dramatic. You could blow up your favorite picture or print at your local copy center, and this will make an even better statement.