The correct answer to this open question is the following.
Although the question does not mention it, we are assuming that we are talking about American colonial times.
If I were an Englishman looking to acquire beautiful, blue dye for my wife's new gown I know that the raw material I will need to acquire is the indigo plant. I would have to go to the Southern Carolina plantations to acquire this dye, starting with the raw material & ending with the finished product. Or I could buy it in England because Indigo was exported to Britain and had a high value for the textile industry.
The blue dye was extracted from the leaves of the indigo plant in this colony. In 1740, Indigo was the second most important crop grown in South Carolina, just after rice. y 1790, most of the production of crops in South Carolina were exported to England to satisfy its mercantilistic approach and greed to make money.