Is a purple moon real?

Could you elaborate on the concept of a "purple moon"? Is this a reference to a natural occurrence, a scientific phenomenon, or perhaps a metaphorical expression? If it's the former, are you asking about the possibility of the moon appearing purple in color due to certain atmospheric conditions, celestial events, or perhaps even the reflection of light from a nearby planet or star? If it's the latter, could you please provide some context as to what you mean by a "purple moon" and how it relates to your inquiry? Additionally, are you seeking factual information, opinions, or both?