Firstly, it's aura, not ora. And here's what I have found on several websites:
Green is the color of harmony and balance. It is also the color of the soul, reflecting the fact that the soul is the liaison between the spirit and the earthly/bodily personality. When green is murky, it indicates a person who is jealous of what others have, possessive, selfish, and manipulative. This is where we get the term, "Green with envy." A strong murky green indicates chronic depression. If coming from above it signifies a person who seeks a sense of individuality and identity. It would also mean the person is compassionate and sympathetic.
GREEN AURA COLOR MEANING: Relates to heart and lungs.It is a very comfortable, healthy color of nature. When seen in the aura this usually represents growth and balance, and most of all, something that leads to change.Love of people, animals, nature; teacher; social
Bright emerald green: A healer, also a love-centered person
Yellow-Green: Creative with heart, communicative
Dark or muddy forest green: Jealousy, resentment, feeling like a victim of the world; blaming self or others; insecurity and low self-esteem; lack of understanding personal responsibility; sensitive to perceived criticism
Hope this helps!