You are boating near shore at twilight. you see a triangle-shaped daymark. you cannot make out the marker's color. what color is it?

Mst common daymarkers are green triangles and red squares. The former are equivalents to cans and the later are equivalent to nuns. They are the traffic signals and allows the ships to pass through the waterways, safely. So in this case, the triangular daymarker is green in color.