Queen Elizabeth II, wearing black, greets well-wishers at Howe Barracks in Canterbury, England, on November 9, 2004. Getty Images
Queen Elizabeth II, wearing red, waits to thank local volunteers and key workers for their efforts amid the coronavirus pandemic, at Windsor Castle on December 8, 2020. Getty Images
Queen Elizabeth II, wearing red, arrives to welcome Qatar's Sheikh Hamad bin Khalifa Al Thani to her Windsor residence on October 26, 2010. Getty Images
Queen Elizabeth II, wearing red, during a visit to HMS Queen Elizabeth at HM Naval Base ahead of the ship's maiden deployment on May 22, 2021 in Portsmouth, England. Getty Images
Queen Elizabeth II, wearing orange, and Prince Edward, Earl of Wessex, at Buckingham Palace on October 7, 2021, for the launch of the queen's Baton Relay for Birmingham for the 2022 Commonwealth Games. Getty Images
Queen Elizabeth ll, wearing orange, attends The Vivari Queen's Cup Final at Guards Polo Club on June 17, 2007, in Windsor, England. Getty Images
Queen Elizabeth II, wearing orange, attends Royal Ascot on June 20, 2015, in Berkshire, England. Getty Images
Queen Elizabeth II, wearing peach, arrives to unveil a memorial to the Queen Mother on The Mall on February 24, 2009, in London. Getty Images
Queen Elizabeth II, wearing peach, formally opens the new South Lynn Fire Station on February 2, 2015, in King's Lynn, Norfolk, England. Getty Images
Queen Elizabeth II, wearing yellow, at Epsom Downs Racecourse for the Oaks Stakes, Surrey, 1960. Getty Images
Queen Elizabeth II, wearing yellow, attends the first day of Royal Ascot on June 15, 2004, in Berkshire, England. Getty Images
Queen Elizabeth II, wearing yellow, walks to the Royal Enclosure June 21, 2001 at Ascot Racecourse in Ascot, England. Getty Images
Queen Elizabeth II, wearing yellow, attends Derby Day of the Epsom Derby on June 5, 2010, in Epsom, England. Getty Images
Queen Elizabeth II, wearing yellow, attends Royal Ascot 2015 at Ascot racecourse on June 19, 2015 in Ascot, England. Getty Images
Queen Elizabeth II, wearing yellow, and Prince Philip, Duke of Edinburgh, arrive at New Scotland Yard on July 13, 2017, in London. Getty Images
Queen Elizabeth II, wearing yellow, waves to the crowds during a visit to Greenfaulds High School on June 28, 2019, in Cumbernauld, Scotland. Getty Images
Queen Elizabeth II, wearing light green, during a visit to The Royal Australian Air Force Memorial on March 31, 2021, near Egham, England. Getty Images
Queen Elizabeth II, wearing lime green, meets members of the public in Chester, England, on June 14, 2018. Getty Images
Queen Elizabeth II, in light green, attends a ceremony to mark her official birthday at Windsor Castle on June 13, 2020. Getty Images
Queen Elizabeth II, wearing green, opens the Cardiff University Brain Research Imaging Centre on June 7, 2016. Getty Images
Queen Elizabeth II, wearing green, attends a service to mark the Centenary of the Order of the British Empire at St Paul's Cathedral on May 24, 2017 in London, England. Getty Images
Queen Elizabeth II, wearing green, shelters from the rain during a garden party at Buckingham Palace on July 19, 2011 in London, England. Getty Images
Queen Elizabeth II, wearing green, arrives to formally open the new headquarters of asset management company Schroders on November 7, 2018, in London. Getty Images
Queen Elizabeth II, wearing green, during a visit to the Edinburgh Climate Change Institute, as part of her traditional trip to Scotland for Holyrood Week on July 1, 2021, in Edinburgh. Getty Images
Queen Elizabeth II, wearing dark green, arrives for the opening of the sixth session of the Scottish Parliament on October 2, 2021, in Edinburgh. Getty Images
Queen Elizabeth II, wearing turquoise, and Prince Philip, Duke of Edinburgh, attend the official open the National Cyber Security Centre on February 14, 2017, in London. Getty Images
Queen Elizabeth II, wearing turquoise, opens Newtongrange Station on September 9, 2015, in Newtongrange, Scotland. Getty Images
Queen Elizabeth II, wearing turquoise, visits The Lexicon shopping centre during a visit to Bracknell, England, on October 19, 2018. Getty Images
Queen Elizabeth II, wearing blue, attends the traditional Royal Maundy Service at Windsor Castle on March 24, 2016. Getty Images
Queen Elizabeth II, wearing turquoise, hosts a Garden Party at Buckingham Palace on May 31, 2018. Getty Images
Queen Elizabeth II, wearing blue, and Prince Philip, Duke of Edinburgh, after the christening of Prince George at St James's Palace on October 23, 2013, in London. Getty Images
Queen Elizabeth II, in light blue, during a visit to the headquarters of British Airways at Heathrow, London, on May 23, 2019. Getty Images
Queen Elizabeth II, in blue, arrives at Hull train station during a visit to the English city on November 16, 2017. Getty Images
Queen Elizabeth II, in blue, attends the Ceremony of the Keys on the forecourt of the Palace of Holyroodhouse in Edinburgh. Getty Images
Queen Elizabeth II, wearing light blue, waves to well-wishers as she departs for Melbourne on March 15, 2006, in Canberra. Getty Images
Queen Elizabeth II, in light blue, attends a military ceremony in the Quadrangle of Windsor Castle to mark her official birthday at Windsor Castle on June 12, 2021. Getty Images
Queen Elizabeth II, in light blue, attends the Royal Garden Party at Buckingham Palace on May 21, 2019, in London, England. Getty Images
Queen Elizabeth II, in light blue, and Prince Philip, Duke of Edinburgh, await the arrival of Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah of Kuwait at Windsor Castle during a three-day state visit on November 27, 2012. Getty Images
Queen Elizabeth II, in blue, attends events to mark the centenary of the RAF on July 10, 2018, in London. Getty Images
Queen Elizabeth II, in blue, and Prince William, Duke of Cambridge, visit the scene of the Grenfell Tower fire on June 16, 2017, in London. Getty Images
Queen Elizabeth II, in blue, visits St John's College at the University of Cambridge, England, on April 27, 2011. Getty Images
Queen Elizabeth II, in blue, and Anne, Princess Royal, visit Skypark in Glasgow, Scotland, on June 30, 2021. Getty Images
Queen Elizabeth II, wearing blue, attends the inauguration ceremony of the Memorial Gates at Constitution Hill on November 6, 2002, in London. Getty Images
Queen Elizabeth II, wearing navy blue, attends a service of Thanksgiving to mark the centenary of The Royal British Legion at Westminster Abbey on October 12, 2021, in London. Getty Images
Queen Elizabeth II, in purple, leaves a Service of Thanksgiving at Westminster Abbey on April 7, 2017, in London. Getty Images
Queen Elizabeth II, wearing purple, leaves Sandringham Church after attending the Christmas Day service on December 25, 2004, in Norfolk, England. Getty Images
Queen Elizabeth II, wearing purple, attends the opening of the rebuilt Jubilee Gardens on October 25, 2012, in London. Getty Images
Queen Elizabeth II, in lilac, attends the Solemn Drumhead service at Royal Hospital Chelsea on June 28, 2014, in London. Getty Images
Queen Elizabeth II, wearing purple, leaves Chester Cathedral after the wedding of Lady Tamara Grosvenor on November 6, 2004, in Chester, England. Getty Images
Queen Elizabeth II, wearing purple, after officially opening the Argyll and Sutherland Highlanders Museum at Stirling Castle June 29, 2021, in Stirling, Scotland. Getty Images
Queen Elizabeth II, wearing mauve, and Prince Philip, Duke of Edinburgh, arrive for Evensong in celebration of the centenary of the Order of the Companions of Honour at Hampton Court Palace on June 13, 2017, in London. Getty Images
Queen Elizabeth II, wearing claret, visits the headquarters of MI5 at Thames House, London, on February 25, 2020. Getty Images
Queen Elizabeth II, wearing pink, during her visit to Berkhamsted School as part of its 475th anniversary celebrations on May 6, 2016, in Berkhamsted, England. Getty Images
Queen Elizabeth II, wearing pink, meets veterans during the D-Day 75 Commemorations on June 05, 2019, in Portsmouth, England. Getty Images
Queen Elizabeth II, wearing pink, during the Patron's Lunch at The Mall, London, for her 90th birthday celebrations on June 12, 2016. Getty Images
Queen Elizabeth II, wearing pink, pictured during a visit to the Bailey caravan factory as part of her diamond Jubilee tour on November 22, 2012, in Bristol, England. Getty Images
Queen Elizabeth II, wearing pink, visits The Royal Welsh Regimental Family to mark St David's Day at Lucknow Barracks in Tidworth, England, on March 3, 2017. Getty Images
Queen Elizabeth II, wearing pink, during an inspection of the Balaklava Company, 5 Battalion The Royal Regiment of Scotland, at the gates at Balmoral, Scotland, on August 9, 2021. Getty Images
Queen Elizabeth II, wearing pink, arrives for the opening ceremony of the sixth session of the Senedd at The Senedd on October 14, 2021 in Cardiff. Getty Images
Queen Elizabeth II, wearing pink, and Prince of Philip, Duke of Edinburgh, arrive at the Royal Botanic Garden Edinburgh on July 12, 2010. Getty Images
Queen Elizabeth II, wearing pink, visits the Defence Science and Technology Laboratory at Porton Down science park near Salisbury, England, on October 15, 2020. Getty Images
Queen Elizabeth II, wearing pink, waits for the arrival of US President Joe Biden at Windsor Castle on June 13, 2021. Getty Images
Queen Elizabeth II, in light pink, with members of the royal family, arrives at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge on July 5, 2015, in King's Lynn, England. Getty Images
Queen Elizabeth II, wearing light pink, during a garden party at Buckingham Palace on May 16, 2017, in London. Getty Images
Queen Elizabeth II, wearing light pink, arrives to the Chichester Theatre while visiting West Sussex, England, on November 30, 2017. Getty Images
Queen Elizabeth II, wearing light pink, attends the Royal Garden Party at Buckingham Palace on May 29, 2019 in London, England. Getty Images
Queen Elizabeth II, wearing white, talks to Rob Holden, chairman of HS1, as she unveils a plaque at St Pancras International in London on June 5, 2014. Getty Images
German Chancellor Angela Merkel welcomes Queen Elizabeth II, wearing white, and Prince Philip, Duke of Edinburgh, to the Chancellery in Berlin on June 24, 2015. Getty Images
Queen Elizabeth II, in black, leaves St Paul's Cathedral after attending the National Memorial Service dedicated to victims of the July 7 bombings on November 1, 2005, in London. Getty Images
Queen Elizabeth II, wearing black mourning attire, leaves a memorial service for her sister, Princess Margaret, on April 19, 2002, at Westminster Abbey in London. Getty Images
Queen Elizabeth II, wearing black, greets well-wishers at Howe Barracks in Canterbury, England, on November 9, 2004. Getty Images
Queen Elizabeth II, wearing red, waits to thank local volunteers and key workers for their efforts amid the coronavirus pandemic, at Windsor Castle on December 8, 2020. Getty Images
Queen Elizabeth II, wearing red, arrives to welcome Qatar's Sheikh Hamad bin Khalifa Al Thani to her Windsor residence on October 26, 2010. Getty Images
Queen Elizabeth II, wearing red, during a visit to HMS Queen Elizabeth at HM Naval Base ahead of the ship's maiden deployment on May 22, 2021 in Portsmouth, England. Getty Images
Queen Elizabeth II, wearing orange, and Prince Edward, Earl of Wessex, at Buckingham Palace on October 7, 2021, for the launch of the queen's Baton Relay for Birmingham for the 2022 Commonwealth Games. Getty Images
Queen Elizabeth ll, wearing orange, attends The Vivari Queen's Cup Final at Guards Polo Club on June 17, 2007, in Windsor, England. Getty Images
Queen Elizabeth II, wearing orange, attends Royal Ascot on June 20, 2015, in Berkshire, England. Getty Images
Queen Elizabeth II, wearing peach, arrives to unveil a memorial to the Queen Mother on The Mall on February 24, 2009, in London. Getty Images
Queen Elizabeth II, wearing peach, formally opens the new South Lynn Fire Station on February 2, 2015, in King's Lynn, Norfolk, England. Getty Images
Queen Elizabeth II, wearing yellow, at Epsom Downs Racecourse for the Oaks Stakes, Surrey, 1960. Getty Images
Queen Elizabeth II, wearing yellow, attends the first day of Royal Ascot on June 15, 2004, in Berkshire, England. Getty Images
Queen Elizabeth II, wearing yellow, walks to the Royal Enclosure June 21, 2001 at Ascot Racecourse in Ascot, England. Getty Images
Queen Elizabeth II, wearing yellow, attends Derby Day of the Epsom Derby on June 5, 2010, in Epsom, England. Getty Images
Queen Elizabeth II, wearing yellow, attends Royal Ascot 2015 at Ascot racecourse on June 19, 2015 in Ascot, England. Getty Images
Queen Elizabeth II, wearing yellow, and Prince Philip, Duke of Edinburgh, arrive at New Scotland Yard on July 13, 2017, in London. Getty Images
Queen Elizabeth II, wearing yellow, waves to the crowds during a visit to Greenfaulds High School on June 28, 2019, in Cumbernauld, Scotland. Getty Images
Queen Elizabeth II, wearing light green, during a visit to The Royal Australian Air Force Memorial on March 31, 2021, near Egham, England. Getty Images
Queen Elizabeth II, wearing lime green, meets members of the public in Chester, England, on June 14, 2018. Getty Images
Queen Elizabeth II, in light green, attends a ceremony to mark her official birthday at Windsor Castle on June 13, 2020. Getty Images
Queen Elizabeth II, wearing green, opens the Cardiff University Brain Research Imaging Centre on June 7, 2016. Getty Images
Queen Elizabeth II, wearing green, attends a service to mark the Centenary of the Order of the British Empire at St Paul's Cathedral on May 24, 2017 in London, England. Getty Images
Queen Elizabeth II, wearing green, shelters from the rain during a garden party at Buckingham Palace on July 19, 2011 in London, England. Getty Images
Queen Elizabeth II, wearing green, arrives to formally open the new headquarters of asset management company Schroders on November 7, 2018, in London. Getty Images
Queen Elizabeth II, wearing green, during a visit to the Edinburgh Climate Change Institute, as part of her traditional trip to Scotland for Holyrood Week on July 1, 2021, in Edinburgh. Getty Images
Queen Elizabeth II, wearing dark green, arrives for the opening of the sixth session of the Scottish Parliament on October 2, 2021, in Edinburgh. Getty Images
Queen Elizabeth II, wearing turquoise, and Prince Philip, Duke of Edinburgh, attend the official open the National Cyber Security Centre on February 14, 2017, in London. Getty Images
Queen Elizabeth II, wearing turquoise, opens Newtongrange Station on September 9, 2015, in Newtongrange, Scotland. Getty Images
Queen Elizabeth II, wearing turquoise, visits The Lexicon shopping centre during a visit to Bracknell, England, on October 19, 2018. Getty Images
Queen Elizabeth II, wearing blue, attends the traditional Royal Maundy Service at Windsor Castle on March 24, 2016. Getty Images
Queen Elizabeth II, wearing turquoise, hosts a Garden Party at Buckingham Palace on May 31, 2018. Getty Images
Queen Elizabeth II, wearing blue, and Prince Philip, Duke of Edinburgh, after the christening of Prince George at St James's Palace on October 23, 2013, in London. Getty Images
Queen Elizabeth II, in light blue, during a visit to the headquarters of British Airways at Heathrow, London, on May 23, 2019. Getty Images
Queen Elizabeth II, in blue, arrives at Hull train station during a visit to the English city on November 16, 2017. Getty Images
Queen Elizabeth II, in blue, attends the Ceremony of the Keys on the forecourt of the Palace of Holyroodhouse in Edinburgh. Getty Images
Queen Elizabeth II, wearing light blue, waves to well-wishers as she departs for Melbourne on March 15, 2006, in Canberra. Getty Images
Queen Elizabeth II, in light blue, attends a military ceremony in the Quadrangle of Windsor Castle to mark her official birthday at Windsor Castle on June 12, 2021. Getty Images
Queen Elizabeth II, in light blue, attends the Royal Garden Party at Buckingham Palace on May 21, 2019, in London, England. Getty Images
Queen Elizabeth II, in light blue, and Prince Philip, Duke of Edinburgh, await the arrival of Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah of Kuwait at Windsor Castle during a three-day state visit on November 27, 2012. Getty Images
Queen Elizabeth II, in blue, attends events to mark the centenary of the RAF on July 10, 2018, in London. Getty Images
Queen Elizabeth II, in blue, and Prince William, Duke of Cambridge, visit the scene of the Grenfell Tower fire on June 16, 2017, in London. Getty Images
Queen Elizabeth II, in blue, visits St John's College at the University of Cambridge, England, on April 27, 2011. Getty Images
Queen Elizabeth II, in blue, and Anne, Princess Royal, visit Skypark in Glasgow, Scotland, on June 30, 2021. Getty Images
Queen Elizabeth II, wearing blue, attends the inauguration ceremony of the Memorial Gates at Constitution Hill on November 6, 2002, in London. Getty Images
Queen Elizabeth II, wearing navy blue, attends a service of Thanksgiving to mark the centenary of The Royal British Legion at Westminster Abbey on October 12, 2021, in London. Getty Images
Queen Elizabeth II, in purple, leaves a Service of Thanksgiving at Westminster Abbey on April 7, 2017, in London. Getty Images
Queen Elizabeth II, wearing purple, leaves Sandringham Church after attending the Christmas Day service on December 25, 2004, in Norfolk, England. Getty Images
Queen Elizabeth II, wearing purple, attends the opening of the rebuilt Jubilee Gardens on October 25, 2012, in London. Getty Images
Queen Elizabeth II, in lilac, attends the Solemn Drumhead service at Royal Hospital Chelsea on June 28, 2014, in London. Getty Images
Queen Elizabeth II, wearing purple, leaves Chester Cathedral after the wedding of Lady Tamara Grosvenor on November 6, 2004, in Chester, England. Getty Images
Queen Elizabeth II, wearing purple, after officially opening the Argyll and Sutherland Highlanders Museum at Stirling Castle June 29, 2021, in Stirling, Scotland. Getty Images
Queen Elizabeth II, wearing mauve, and Prince Philip, Duke of Edinburgh, arrive for Evensong in celebration of the centenary of the Order of the Companions of Honour at Hampton Court Palace on June 13, 2017, in London. Getty Images
Queen Elizabeth II, wearing claret, visits the headquarters of MI5 at Thames House, London, on February 25, 2020. Getty Images
Queen Elizabeth II, wearing pink, during her visit to Berkhamsted School as part of its 475th anniversary celebrations on May 6, 2016, in Berkhamsted, England. Getty Images
Queen Elizabeth II, wearing pink, meets veterans during the D-Day 75 Commemorations on June 05, 2019, in Portsmouth, England. Getty Images
Queen Elizabeth II, wearing pink, during the Patron's Lunch at The Mall, London, for her 90th birthday celebrations on June 12, 2016. Getty Images
Queen Elizabeth II, wearing pink, pictured during a visit to the Bailey caravan factory as part of her diamond Jubilee tour on November 22, 2012, in Bristol, England. Getty Images
Queen Elizabeth II, wearing pink, visits The Royal Welsh Regimental Family to mark St David's Day at Lucknow Barracks in Tidworth, England, on March 3, 2017. Getty Images
Queen Elizabeth II, wearing pink, during an inspection of the Balaklava Company, 5 Battalion The Royal Regiment of Scotland, at the gates at Balmoral, Scotland, on August 9, 2021. Getty Images
Queen Elizabeth II, wearing pink, arrives for the opening ceremony of the sixth session of the Senedd at The Senedd on October 14, 2021 in Cardiff. Getty Images
Queen Elizabeth II, wearing pink, and Prince of Philip, Duke of Edinburgh, arrive at the Royal Botanic Garden Edinburgh on July 12, 2010. Getty Images
Queen Elizabeth II, wearing pink, visits the Defence Science and Technology Laboratory at Porton Down science park near Salisbury, England, on October 15, 2020. Getty Images
Queen Elizabeth II, wearing pink, waits for the arrival of US President Joe Biden at Windsor Castle on June 13, 2021. Getty Images
Queen Elizabeth II, in light pink, with members of the royal family, arrives at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge on July 5, 2015, in King's Lynn, England. Getty Images
Queen Elizabeth II, wearing light pink, during a garden party at Buckingham Palace on May 16, 2017, in London. Getty Images
Queen Elizabeth II, wearing light pink, arrives to the Chichester Theatre while visiting West Sussex, England, on November 30, 2017. Getty Images
Queen Elizabeth II, wearing light pink, attends the Royal Garden Party at Buckingham Palace on May 29, 2019 in London, England. Getty Images
Queen Elizabeth II, wearing white, talks to Rob Holden, chairman of HS1, as she unveils a plaque at St Pancras International in London on June 5, 2014. Getty Images
German Chancellor Angela Merkel welcomes Queen Elizabeth II, wearing white, and Prince Philip, Duke of Edinburgh, to the Chancellery in Berlin on June 24, 2015. Getty Images
Queen Elizabeth II, in black, leaves St Paul's Cathedral after attending the National Memorial Service dedicated to victims of the July 7 bombings on November 1, 2005, in London. Getty Images
Queen Elizabeth II, wearing black mourning attire, leaves a memorial service for her sister, Princess Margaret, on April 19, 2002, at Westminster Abbey in London. Getty Images
Queen Elizabeth II, wearing black, greets well-wishers at Howe Barracks in Canterbury, England, on November 9, 2004. Getty Images
Queen Elizabeth II's style colour-coded - in pictures
