Which color is not standard for lighted aids to navigation?

In the context of lighted aids to navigation, the standard colors recognized are white, red, and green. These colors serve specific purposes:

• White lights are used for various types of navigational marks, providing general illumination or signaling.
• Red lights typically indicate port side marks and are used to warn vessels of hazards or areas to avoid.
• Green lights are generally used for starboard side marks, guiding vessels safely through channels.

Black is not a standard color for lighted aids to navigation; it may be used in other contexts but does not have an established role in the color coding of navigational lights. Therefore, identifying black as the non-standard color emphasizes the importance of knowing the specific roles that recognized colors play in maritime navigation and safety. Understanding the implications of these standard colors can aid mariners in interpreting navigational signals and making informed decisions while on the water.