meanings of colors:
Green : Peace, safety, relaxation, freshness, growth, healing, money, environment.
White: Freshness, hope, goodness, light, purity, cleanliness, simplicity, coolness
Yellow: Joy, cheerfulness, friendliness, intellect, energy, warmth, caution, cowardice.
I think they mean you are peaceful, cool, joyful, cheerful, friendly and good!