Usually, white is a good color as the new tenants will be able to paint over it.  This is just if you painted anything while you were in your apartment – if you didn’t don’t worry about painting.  You always want to make sure that you leave the place spic and span though. 

That includes breaking out the cleaning supplies and vacuuming down the entire place.  This will leave a good impression on your landlord and you will probably get your full security deposit back!