Blue tansy has also become a well-known essential oil. The above-ground flowers and stems of the blue tansy plant are gathered and steam-distilled. In the distillation process, one of the chemical components of the oil, chamazulene, is released. When heated, chamazulene turns deep blue, giving the oil itâ??s indigo-to-cerulean hue Aromatherapy practitioners praise its calming effects. Blue tansy, or its components, have been shown to have anti-inflammatory, antihistamine, and skin-calming effects.
