To dream of a raincoat represents your personality you face and attempt to shield yourself from difficulty, disappointment, sadness, or depression. You are finding the resources necessary to do what you need to do or to get through a difficult situation.
A yellow raincoat symbolizes self-awareness as you protect yourself in the face adversity. You are noticing yourself doing everything you can to stay away from negativity or negative thinking patterns.
Example: A young man dreamed of being with a woman in a yellow raincoat. In real life he was changing schools to avoid bad influences and had to put up with a lot of stress and peer pressure in order to do it. The yellow raincoat reflected him noticing himself doing everything he could to avoid the bad people who were such a negative influence.