To see or wear a mood ring in your dream indicates that your feelings are being dictated by some outside forces. You are too moody. Or it may mean that you need to express your emotions more freely and openly, instead of keeping it all inside. Consider the colour of the mood ring and how it reflects your waking mood. Blue means that you are feeling calm and relaxed. Red or purple signifies joy and love. Green represents balance and harmony. Yellow or orange suggests tension or excitability. Brown denotes your nervousness or irritability about something. And black means you are feeling sad, indifferent or cold.
- Common Dreams