1966 was a massive year for French design genius Yves Saint Laurent - he played with gender roles by - gasp! - putting a woman in his classic 'Le Smoking' tuxedo (top center) and echoed 1920s Chanel with a straight-sided sequined shift in black and white (top right).
As Op Art and Pop Art dominated the international gallery scene, everything had to either be super-bright or black and white. Paco Rabanne went with the former (top left) but as you can see from the marketing around this classic blue sheath (bottom center), even relatively staid garments were being sold in wild ways.
[Image sources, clockwise from top left: Couture Allure, Polyvore.com, Dipity.com, Magdorable.]