Indigo (Fera tinctoria) is a 100% pure herbal plant which gives deep blue color . Arabic and Urdu language name of Indigo is WASMA. Original high class Indigo when used in starting gives deep green color but after 24 to 48 hours it changes the color and becomes deep blue. The secret of judging the high class Indigo is from its deep blue color and if it is not giving deepness then that means it is of low quality.
The history of this plant is very old. Earlier people tend to use this plant for fabric dye and for medicine purpose only but now a wide variety of its uses and purposes are known. Indigo consists of the genus Indigo fera, of the family Palionoideae. Indigo is stimulated and purgative. It is an antiseptic and an astringent.