Good job. Only comment: Change the color of the sins. The scarlet sins are washed with red blood, though Biblically accurate, doesn't make for a very pretty image. You contrast the red and white later, which is nice, but try to contrast the first two objects as well. This may be difficult, seeing as this is a haiku, but I think it would add a lot to your poem.
Come now, and let us reason together, saith the Lord: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
this is the Bible verse.
You prove again that you are the Haiku Queen.
no word to say. And love to read about Jesus.