The element Water is connected to black (hei) or blue (lan). Blue is the color of healing, relaxation, trust, calmness, and immortality. Just think of the ocean, isn't that calming you already? Black is a more neutral color, it could be associated with stability, adaptability, and will. But is it also used for dark, evil, and sinister.
Bylo to na kanálech:
Četa 
Policie Modrava 
Vetřelci 