The Reversible Kimono - Mustard and Navy, and our entire Mustard Seed collection, is inspired by the Bible verse in Matthew 17:20 that says, "If you have faith like a grain of a mustard seed, you can say to this mountain, 'Move from here to there,' and it will move. Nothing will be impossible for you." The mustard color is a representation of faith that is carried throughout each product, always tying back to the verse.