Question

what is difference between blue moon and red moon

Answer 1

A Blue Moon does not refer to the color of the moon, as one might expect. Instead, it usually refers to the second full moon in a month. The last Blue Moon occurred on May 21, 2016, and the next one is on Jan. 31, 2018. 

Sometimes, the third full moon in a season is also called a Blue Moon, which may be a partial explanation for one of the definitions of the Black Moon, Berman said. The term "Blue Moon" originated in the 1940s but didn't become widely used until a few decades ago, he said.
The so-called blood moon happens during a total lunar eclipse. At that time, the Earth passes in between the sun and the moon, and blocks the sun's light from falling directly onto the moon. Instead, the moon receives a little light from the edges of Earth's atmosphere, which turns the light (and the moon's surface) red. Skywatchers who have witnessed a total lunar eclipse will understand why it is called the blood moon.

☆☞ and it was blood moon not red!!!