Colors have varied meaning across different cultures but the following representations are universal in the case of emotions:
Red: Passion, Love, Anger.
Orange: Energy, Happiness, Vitality.
Yellow: Happiness, Hope, Deceit.
Green: New Beginnings, Abundance, Nature.
Blue: Calm, Responsible, Sadness.
Purple: Creativity, Royalty, Wealth.
Black: Mystery, Elegance, Evil.
Gray: Moody, Conservative, Formality.