The green light would be located on the right, or starboard, side of the boat.
Green.
Starboard (right side).
The green light is right hand side or 'Starboard'
The right side of the vessel is the starboard side, the light is green. The light is coordinated to the starboard side of the vessel no matter how you look at it. Refer to Rule 21 of the 72 COLREGS, a link is provided below.
The green light would be located on the right, or starboard, side of the boat.
Starboard, ie the right hand side.
starboard(right)
A green light is on the starboard side of the vessel. So it may mean that the starboard side is directly facing you.
Green on the starboard (right hand side standing aft and looking forward) red on the port.
The starboard, or right hand, side- the one on the port side is red.
Red marks the Port or left side. (Green is Starboard or the right-hand side.) Port