Blue signifies the celestial love of truth. That “blue” has this signification, is because it belongs to the color of the sky, and because by this color is signified truth from a celestial origin, which is truth from the good of love to the Lord. This good reigns in the inmost heaven, and in the middle or second heaven it is presented to view as crimson and blue; the good itself as crimson, and the derivative truth as blue.
For in the other life, and in heaven itself, there appear most beautiful colors, all deriving their origin from good and truth. For the sphere of the affections of good and truth is sensibly presented before the eyes of angels and spirits by means of colors, and specific things by variously colored objects.
They are presented to the nostrils also by means of odors. For everything celestial, which is of good, and everything spiritual, which is of truth, is represented in the lower heavens by such things as appear in nature, thus to the very senses of the spirits and angels there. The reason why the spheres of the affection of good and truth are visibly presented by means of colors, is that the colors are modifications of heavenly light, thus of intelligence and wisdom.
Purple will rule.
Away with blue vestments.