We can infer and logically deduce that the color of a boat's sternlight is white.
A sternlight can be defined as a white light that is designed and developed to be placed as closely as possible and practical with the stern shining continuously (constantly).
By default, a sternlight is typically affixed to the boat in such a way that the light will shine out at an angle of 135 degrees (135°) from the back of the boat.
In this context, we can infer and logically deduce that the color of a boat's sternlight is white and it avails sailors and other persons the opportunity of determining and knowing the direction that a boat (vessel) is moving.
Read more on sternlight here: https://brainly.com/question/27999695
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Complete Question:
What color is a boat sternlight?