In 1498, Portuguese explorer Vasco da Gama reached Calicut, India, establishing the first direct maritime link between Europe and Asia. This pivotal moment in global trade facilitated the import of indigo and other valuable commodities, allowing Portugal to bypass Ottoman-controlled land routes. The expedition significantly altered trade dynamics and initiated a new era of European exploration and colonization in Asia.

The opening of the sea route to India inspired narratives of heroic voyages and cultural encounters, significantly shaping Renaissance literature. Poets from Camões to contemporary postcolonial writers have explored themes of travel, discovery, and the complexities of cultural exchange, with indigo symbolizing depth and mystery in their works.