Scarlet
'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.
(Referenser: Apocalypse Explained 67)