Henna and indigo, both with rich historical backgrounds, have been used for centuries in various cultures for hair dyeing and other purposes. Henna, derived from the Lawsonia Inermis plant, traditionally imparts a reddish-brown colour and is known for its natural conditioning properties. Indigo, obtained from the Indigofera tinctoria plant, gives a blue to black colour. When these two are combined in a one-step process, they can produce a deep, rich black colour. This involves mixing both powders together with a liquid to form a paste, which, when applied to hair, offers a natural and chemical-free way to achieve a black hue, blending the individual colour properties of both henna and indigo.