Why was it not blue in color?

It is called a blue moon because it was the second full moon in the month and the 4th full Moon in three months.January 1 and January 31 were full moons The Reason the Moon was brown or red brown was there was total lunar eclipse in the early morning before dawn in the Utited States.. The reason for the red brown color is sunlight bing refracted by Earth's atmosphere while the Moon is going through Earth's shadow, the umbra par of of Earth's shadow.

The ONLY time a Moon is literally blue on earth is when there is enough sand in the air to scatter mainly blue light. because of massive e sand storms in the area.. usually in the middle East.

"...In recent years, people have been using the name Blue Moon for the second of two full moons in a single calendar month. An older definition says a Blue Moon is the third of four full moons in a single season. Someday, you might see an actual blue-colored moon. The term once in a blue moon used to mean something rare. Now that the rules for naming Blue Moons include several different possibilities, Blue Moons are pretty common!

We just had a Blue Moon on January 31, 2018. It was a supermoon, too, and underwent a total eclipse. Click here for super Blue Moon eclipse photos.

But another Blue Moon is coming right up. They’re both Blue Moons by the monthly definition of the term: the second of two full moons to fall within a single calendar month. The first Blue Moon was on January 31, and the second on March 31. We haven’t had a year with two Blue Moons since 1999 and won’t have one again until January and March, 2037.

Meanwhile, the month of February 2018 has no full moon at all...."

http://earthsky.org/astronomy-essentials/when-is-t...

Image is of a literally blue Moon in Tel Aviv in July 9, 2009. source is spaceweather.com

"...BLUE MOON OVER IRAN: A severe dust storm so large that it is visible from space is blowing across Iran. Government officials have closed schools, cancelled flights, and warned the elderly and children to stay indoors. The only good thing about the storm is that it is turning the Moon a pleasing shade of blue:..."

http://www.spaceweather.com/archive.php?view=1&day...

light refraction and UV affects the visual perception

Theories abound as to why the publishers did this. Some say that third moon was traditionally called "blue" in the Czech language, while others think the term comes from the French phrase double moon, "la deux lune," which sounds like blue moon. Other theories hold that almanacs started out printing the various types of moons in different colors, it was not really blue because it was illussion