Indigo is a specific deep blue-purple dye that is the original and most traditional form of dark wash denim. Dark wash is the broader category, covering any deep, rich denim tone, while indigo is its most classic expression. At Charlie B, indigo is the signature dark wash colorway: a rich, deep blue that deepens and becomes more personal with continued wear. The collection includes multiple silhouettes in indigo, including straight, wide-leg, flare, slim, and skinny cuts, so the wash is available across whatever fit works best for you.