For example, the apron border colors of red, white and blue are the national colors of both the United States and France. Symbols are silent emblems having meaning only when interpreted. Given the unique character of the interpretation process, it can be understood that no symbol has absolute meaning. In preparing the following, the late Bro. Frank W. Bobb, Grand Lodge librarian and curator, has used those meanings most widely accepted by Masonic scholars in interpreting the symbolism of the Washington Apron.
RED symbolizes courage, zeal, the blood of life, and fire.
It is the color of Royal Arch Masonry. BLUE has been esteemed since antiquity as a beneficent color, denoting immortality, eternity, chastity and fidelity. RAYS or Glory, symbolic of the power of the Supreme Being to penetrate the innermost reaches of the human heart. It is also part of the architectural arch, being the 9th arch under Solomon's Temple. The pillars which support the arch are emblematical of Wisdom and Strength.