So what is a “Blue Lodge”?
Within Freemasonry, the color blue is a symbol of universal friendship and benevolence, as it is the color of the vault of heaven. Blue is the only color other than white which should be used in a Master’s Lodge for decorations. Within the Blue Lodge are conferred the Craft Degrees. These Masonic rituals represent three degrees which are taken in sequence. First, the Entered Apprentice Degree, second, the Fellow Craft Degree and finally, the Master Mason Degree.