What does scarlet mean in the Bible?

Scarlet means the color red and red represents sin in the Bible.

Umm, no. This is incorrect. Scarlet does not represent sin in the Bible. Sin is represented by Black or darkness. This misunderstanding is probably due to people quoting Isa 1:18 .

Scarlet is one of the main colors used in the construction of the Tabernacle, God's dwelling place in the Old Testament, and the redeeming blood of Jesus Christ in the New Testament. Since it is written that Jehovah God cannot abide with sin, {Habakkuk 1:13} except through the sacrifice of Jesus' blood. So to state that scarlet represents sin in Scripture is in error. Instead, it depicts redemption. :D