SCARLET
In the OT it is a translation of “shani”, and is often accompanied by the word “tolaath”, “worm or weevil”, evidently denoting that the dye was obtained from some animal of this type, such as the cochineal.
Scarlet was widely used in the upholstery of the tabernacle, along with blue and purple; but there it evidently refers to some scarlet fabric.
If purple is taken as a symbol of universal royalty and dominion, scarlet can signify earthly greatness and Israelite royalty (Ex. 39:1-29; Josh. 2:18, 21; 2 Sam. 1:24; Pr. 31 :21; Song 4:3; Isaiah 1:18).
In the NT the Lord Jesus was clothed in a scarlet robe, “kokkinos”, Mt. 27:28 (in Mark and John it is “purple”: it could have been an old, faded robe that either of the two could have received. Names). Scarlet is also used to mark the earthly greatness of Rome (Rev. 17:3, 4; 18:12, 16).