What is the bluish dye that was a major cash crop in colonial south carolina and georgia?

Indigo

Explanation:

The bluish dye that was a major cash crop in colonial South Carolina and Georgia was indigo. Indigo was produced in plantations in the South, and it was one of the main cash crops that supported the economy of the region, along with tobacco and cotton. The success of these crops meant that a large labour force was needed, which increased the need for slave labor.

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