Which of the following colors is used for the training rounds?

The color blue is designated for training rounds in military practices. This specification is important because it distinguishes live ammunition from non-lethal training munitions, promoting safety during training exercises. The use of blue for training rounds helps personnel quickly identify that the ammunition is not intended for combat and is instead for practice purposes. Knowing this color coding prevents confusion and reduces the risk of accidents during training operations, ensuring that all participants are aware of the nature of the rounds being used. This color coding standard is widely recognized and utilized across various military branches, making it crucial for gunners and military personnel to remember.