'Scarlet,' as in Genesis 38:28, signifies spiritual good.

In Isaiah 1:18, this signifies truth derived from good, or truth from a celestial origin, such as is the truth of the Word in its literal and natural sense

'Scarlet,' in Revelation 17:3, signifies truth from a heavenly origin, such as is the truth of the Word in the sense of the letter or natural sense, which is meant by what is holy in it. 

(参照: Apocalypse Explained 67)

3341. Since representations in the next life cannot be manifested except through distinct variations of light and shade it should be realized that all light, and consequently all intelligence and wisdom, come from the Lord, while all shade, and consequently all insanity and stupidity, come from the proprium belonging to man, spirit, or angel. From these two sources all the variations of light and shade that occur in the next life flow and are derived.