By Brandi Fowler
Updated Jun 13, 2016 @ 5:29 pm
Mark Cuthbert/UK Press via Getty
See All the Queen's Monochromatic Looks

Queen Elizabeth celebrated her big 9-0 in April, and the ever-fashionable monarch keeps setting the bar high for royal style (at any age). The British monarch was all smiles Tuesday as she attended yet another fête that celebrated her landmark year—this time in Cardiff, Wales—stealing the show in a monochromatic mint ensemble.

On hand in the city to open the fifth session of the Welsh Assembly, according to People, the queen wore a mint-hued silk tweed coat with a matching Rachel Trevor Morgan fascinator for the occasion, completing her look with a Stewart Parvin silk dress.

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The royal was accompanied by her husband, Prince Philip, as well as her son Prince Charles and his wife Camilla, and was greeted with a 21-gun salute as she exited the royal train at the city's station. Queen Elizabeth's appearance was also part of her tour to the four corners of the United Kingdom in honor of her 90th birthday, the mag reported.

After giving a speech where she commended the Assembly's "remarkable record of achievement," the Queen and Prince Philip took a trip to Cardiff University, where they opened a new $64-million brain research imaging center.