When is a full moon called "blue"? It turns out it has nothing to do with color, but rather it is thought to come from an old English term meaning "betrayer"; this term is used to describe two full moons that occur in one calendar month, and usually happens on average every 2.7 years. There will be no shortage of full moon/blue moons this winter season, as we'll have another double in March (no full moon in February).
In 2015, we were treated to a Super Moon Lunar Eclipse, and I captured the above image from my backyard. This YouTube re-post from 2015 explains the celestial clockwork behind the magic.