Queen Elizabeth II
Queen Elizabeth II may wear a bright blue-colored attire to her granddaughter's wedding on Oct. 12. Pictured: The Queen attends a Christmas Day church service at Sandringham on December 25, 2015 in King's Lynn, England. Getty Images/Chris Jackson

Queen Elizabeth II is known for wearing bright colors in public, and Princess Eugenie’s will be no exception.

Bookmakers Ladbrokes told Express that it is highly likely for Her Majesty to wear something blue during the Oct. 12 union of Princess Eugenie and Jack Brooksbank.

“Punters seem to think the Queen will go for blue on Eugenie’s big day,” Alex Apati from Ladbrokes said.

The color blue currently tops the odds with 2/1, and it is followed by pink at 3/1. Orange is in third with 4/1, purple is in fourth with 5/1, and green is at 6/1. Sunny yellow and cream have also received odds at 6/1.

On May 19, the Queen was photographed in her lime green suit when she attended Prince Harry and Meghan Markle’s wedding at St. George’s Chapel in Windsor Castle. As such, it is highly unlikely for her to wear the same color at Princess Eugenie’s big day.

In 2011, the monarch wore a light-yellow attire designed by Angela Kelly to Prince William and Kate Middleton’s nuptials at Westminster Abbey. In both occasions, Her Majesty paired her attire with the same-colored hat.

June McLeod, a color consultant and author of “Color Psychology Today,” told Good Housekeeping that the Queen’s choice in color actually has more meaning behind it.

“Green is the color of growth and rebirth. A person who wears green is the regulator and open-hearted. Green is a highly significant color worn as a sign of respect and intention for the future,” McLeod said.

The Queen’s green attire at Markle and Prince Harry’s nuptials also featured purple accents.

“Purple is a proud color. It also symbolizes cleansing and indicates a passion for creativity,” she said.

In related news, the Queen will be joined by Prince Philip, Prince Charles, Camilla Parker Bowles, Prince William, Kate Middleton, Prince George, Princess Charlotte, Prince Harry, Meghan Markle, Prince Andrew, and Princess Beatrice to the wedding of Princess Eugenie and Jack Brooksbank at St. George’s Chapel in Windsor Castle on Oct. 12 at 11 a.m.