LONDON - Prince William denied on Thursday that Britain's royals were racist after Meghan, wife of his younger brother Harry, said one unnamed member of the family had asked how dark their son Archie's skin might be.

Meghan, 39, made the allegation during an explosive tell-all interview that she and Harry, 36, gave to Oprah Winfrey and which was aired on Sunday, plunging the British monarchy into its biggest crisis since the 1997 death of Princess Diana, William and Harry's mother.

On a visit to a school in east London, William said he had not talked to Harry since the interview was broadcast just over three days ago.

"I haven't spoken to him yet but I will do," William, 38, said.

Asked by a reporter if the royal family was racist, William said: "We're very much not a racist family."

In the two-hour show, nearly three years after their star-studded wedding in Windsor Castle, Meghan said the royals had ignored her pleas for help while she felt suicidal.

Harry said his father, heir-to-the-throne Prince Charles, had let him down and that he had felt trapped.

On Tuesday, Buckingham Palace issued a statement on behalf of 94-year-old Queen Elizabeth, the princes' grandmother, in which she said the family were saddened by how challenging the couple had found the last few years.

But it was the couple's accusation that one of the royals had made a racist comment which has dominated coverage and has the potential to cause lasting damage to the 1,000-year-old monarchy.

Reuters