Pink Panache

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The start of the female gendering of pink (and exclusion from the male wardrobe) in America and parts of Europe is no earlier than the 1940s or 1950s.

String gets her history geek on
Actually I would trace it back to Gainsborough's paintings Pinky and Blue Boy in the 1790s. They were very controversial because he reversed the children's color roles. It started a fashion of dressing children in those colors among the "artsy" crowd. For adults however, there were very little distinction among masculine and feminine colors and fabrics during the 18th and 19th century.

However, that is the extent of what I know on that particular culture and costuming history question. Personally, I despise pink and have refused to wear it since I was 5.