“Though your sins are as scarlet, they will be as white as snow.”
Sins as scarlet
Sin is anything we do that is against God’s Will, or anything we don’t do that God wants us to do. The Bible teaches us that the result of sin is death. Death means that someone’s blood is shed. Therefore many times sin is expressed with red(scarlet) color. A single sin means that we become stained with scarlet.
White as snow
White is an expression of being pure or Holy. We have all sinned, so we are all red, and we cannot be white. Only one person, Jesus Christ lived His life without sin. That same Jesus Christ comes to us, and takes all of our sins upon Himself. When we allow Him to do that, we finally become as white as snow.