Masonic rings come in many different shapes, designs and colours. You can purchase basic membership rings from any jeweller, and can choose a colour on your own whim if you wish. However, certain colours represent certain lodges, and individual members often choose a particular colour for the Freemason symbolism that is traditional in that colour.
Red on a Masonic ring may indicate that the wearer belongs to the Grand Lodge of Scotland. The Freemason Royal Arch is also red. Red has other symbolic meanings in Freemasonry. Red is the colour of blood, and therefore has associations with war, sacrifice, heroism, charity, devotion and struggle. Red represents the heart and valour.
Blue is associated with lodges descended from the United Grand Lodges of England. It is also considered the universal colour of friendship -- an important concept for a fraternal organisation. Other Masonic symbolism associated with blue includes immortality, eternity, chastity, fidelity and prudence. These values are connected with blue because it is the colour of the sky and its endless reach.
Black is typically associated with the Knights of Malta. It symbolises gravity and sobriety. In the Middle Ages, it was sometimes associated with rebirth and transformation. Black also was thought to show depth of character, because it was simple and without adornment. It was only toward the end of the Middle Ages that black began to be associated with death and mourning.
Masonic rings are often made of gold, in part because it has long been considered a highly precious metal. The gold of the ring demonstrates its value and worth. Gold has also been associated with Freemasonry's symbolic Middle Chamber, which has biblical associations with Solomon's temple as the place where priests stored their vestments. For Masons, it represents the chamber where the faithful receive their rewards for service.
Green, like red, represents the Grand Lodge of Scotland. In Freemasonry, green symbolises resurrection, immortality, a moral life and hope. Green is the colour of grass, trees and plants. It is the colour that comes back every spring after a long, dreary winter.