Kate Middleton forced to make unwanted decision amid Harry's presence

Kate Middleton stepped into the royal spotlight with her one decision that she had to change immediately after facing backlash during Prince Harry's highly publicised recent visit to the UK.

The Princess of Wales's royal debut was marked by a style misstep that triggered widespread criticism, and the future queen had to act fast to redefine it.

The 43-year-old recently unveiled lighter honey-blonde highlights. While some fans praised the look, many others attacked it on social media, prompting the royal to darken her hair again within days.

She made a surprise appearance with Prince William on Queen Elizabeth's death anniversary on September 8, officially returning to her brunette after shocking as a Blonde.

However, the constant scrutiny reportedly took a toll on the Princess, causing emotional trauma that would leave a lasting impact.

Kate's friends told RadarOnline that the criticism left Prince William's wife 'traumatised' and questioning herself during what has already been a grueling year, given her fight to stay cancer-free after defeating the chronic disease.

Sources now say the reaction triggered a rare "crisis of confidence" for the mother-of-three, who has otherwise received widespread support during her illness.

A source said: "Kate came back from her summer break feeling positive, only to be slammed over her appearance. She admitted it left her anxious and doubting herself. After receiving so much kindness since her diagnosis, being torn down over something trivial was really tough."

"Don't like the new hair color. The darker hair is more flattering – the blonde is washing her out," one commenter wrote. Another added: "She's beautiful with darker hair. It looks way better."

However, Kate's fans even celebrated her style, with one reacting: "She looks amazing, good for her."

Those close to Kate say the scrutiny has been particularly bruising given wider stresses within the royal family.

One of Kate's pal revealed the truth, saying: "Kate has always shown strength, but this autumn has been relentless. With the family tensions and criticism of her appearance, she's questioned how much more she can cope with."