The expression “blue jeans” comes from the French phrase “bleu de Gênes”, literally “the blue of Genoa”.
During the Renaissance, denim trousers were made in Chieri, a town near Turin, Italy. Traditionally, they were dyed to a blue colour using natural indigo dye.
They were sold through the harbour of Genoa and they became very popular in the 16th century. They were especially worn by workers and sailors in the Genoese Navy, as they required pants that could be worn wet or dry, the legs of which could easily be rolled up.
Could you imagine people wore jeans so long ago?