An Olympic Opening Ceremony outfit needs to hit at least two important requirements, qualities found in that pink Montreal outfit and in the outfit worn decades later in London: it must be easily visible in a crowded stadium, and it must carefully avoid any colors or symbols that could tie it to a specific country.
The Queen's dress for the 2012 Opening Ceremony needed to have one additional important quality: it had to easily identify a Bond girl.
"The colour of the dress was also fundamental to the success of the sequence. We needed a solid colour that would stand out when The Queen descended towards the giant stadium, and within the setting of the stadium itself, which was a sea of colours. At the same time, care needed to be taken to choose a colour that was not associated strongly with any of the participating Olympic nations. Another important feature of the dress was its pleated skirt, which had to be identifiable as The Queen left the Palace so that it would be recognised as she descended from the helicopter, creating a visual sequence."
The 2012 outfit has proven to be one of mixed opinions, as has that hat from 1976. But like them or not, they're both shining examples of how much thought and careful planning goes into The Queen's wardrobe.
Both outfits are on display at Buckingham Palace's summer exhibition, Fashioning a Reign: 90 Years of Style from The Queen's Wardrobe, open now through October 2, 2016.