
The Blue Suit
I wondered why Catherine chose blue instead of red, white or green (the Italian flag colours) and found out the following per Wikipedia:
Savoy blue (Italian: blu Savoia) or Savoy azure (azzurro Savoia), also known as Italian blue (blu italiano), is a shade of saturated blue between peacock blue and periwinkle, lighter than peacock blue.[1] Since the Middle Ages, it has been the colour of the House of Savoy, the royal dynasty of the Kingdom of Italy from 1861 to 1946, as well as of its predecessor state, the Kingdom of Sardinia–Piedmont.
Having become a National symbol of Italy with the Risorgimento (1859–70), its use continued even after the birth of the Italian Republic (1946) under the name Italian blue. Currently, it is featured in the Presidential Standard of Italy, the sashes for the Italian Armed Forces' officers and the presidents of the Provinces of Italy during the official ceremonies, and the blue jersey for Italian national sports teams.
How very smart of her to go with this reference instead of the more direct flag reference!