Queen Elizabeth’s personal dressers reportedly place her outfits before a fan to test how they will react in the breeze. The internet is a harder force to protect against.
A special Trooping the Colour parade was held in London on Saturday to mark Her Majesty’s 90th birthday in April.
A centuries-old tradition, this year the procession featured 1,600 soldiers, 300 horses and the Royal Air Force Aerobatic Team, the Red Arrows, who conducted a dramatic fly-past over Buckingham Palace.
But the elaborate pageantry literally paled in comparison to the long-reigning monarch, who was unmissable to her thousands of well-wishers in a bright-green coat and hat.
Royal watchers on Twitter likened the striking hue to the green screens employed by film-makers to insert digital backgrounds into scenes.
Some helpfully illustrated the point.
Nice of the Queen to wear a green screen for her birthday celebration...#Queenat90 pic.twitter.com/ozpWKMHbV9
— Jason R (@teacherace) June 11, 2016
Queen: "One rather likes the chroma green outfit."
— James Rawson (@jrawson) June 11, 2016
Philip: "Seems fine darling, what could possibly go wrong?" pic.twitter.com/kAFbykwIQG
@jrawson I can't stop! pic.twitter.com/Iyo6clsEtV
— Isa Kiko (@Isa_Kiko) June 12, 2016
Green screen chroma keying Queen #greenqueen #green #queen pic.twitter.com/1z6U0sT4yi
— Jon Davey (@jondavey007) June 11, 2016
Green Screen Queen 🍏 #TroopingtheColour #queenielimegreenie #happybirthdayliz #thequeen #queenat90 pic.twitter.com/NEZ786YCCc
— Rose Pilkington (@Rosetpilkington) June 11, 2016
Green Screen Queen #Queenat90 pic.twitter.com/RoVlSJK03u
— Sam Chaplin (@SamChaplin) June 11, 2016
Meanwhile, heavy rain is threatening to disrupt a street party for 10,000 people planned for The Mall in central London on Sunday.
The Met Office has forecast rain for central London on Sunday morning before scattered heavy and thundery showers move through the area in the afternoon.
Umbrellas are banned on site, so thousands of plastic macs are on standby alongside the pork pies and cake.
