Bigen Permanent Powder Hair Color in Dark Auburn 37 offers a rich and vibrant shade for your hair. Its convenient powder formula ensures easy application—just mix with plain water. Enjoy long-lasting color that looks beautiful and true-to-life, without the heavy masking odor typically found in other hair dyes, thanks to its ammonia-free composition. Get the rich and vibrant hair color you desire with Bigen Permanent Powder Hair Color in Dark Auburn 37. Its convenient powder formula makes application easy and simple. Plus, the ammonia-free composition means you can achieve beautiful and true-to-life color without the heavy masking odor typically found in other hair dyes.