The name of this phenomenon is not exactly related to a special tone of the moon, but rather to the rarity of the event. The name is related to the English expression “once in a blue moon”.
The supermoon this Wednesday, the 30th, will be like many others. During this phenomenon, it is possible to observe the Moon when it is in the full moon phase. That is when it is at the point of its orbit closest to our planet - 357,344 kilometres away, which represents 50 thousand kilometres closer to Earth than usual.