What color is starboard light?

A starboard running light is green while the port side running light is red. furthermore, looking toward the front of the vehicle (airplane,ship) starboard is right and port is on the left. these lights are used to determine the heading of the vehicle. if you are looking out across a distance and u see green on your right and red on your left the vehicle is either stationary or moving in a parallel direction as you are. similarly, if you see green on your left and red on your right chances are you are facing each other and a change of course may be needed to avoid a head on collision.