Blanche Blackwell, right, with actress Jenny Seagrove, who portrayed a character based on Mrs. Blackwell in Noël Coward’s “Volcano” in 2012. (Dave M. Benett/Getty Images)

Blanche Blackwell’s romantic life inspired one of Noël Coward’s plays about an upper-crust love triangle, and swashbuckling Hollywood star Errol Flynn wanted to marry her. She was a member of one of Jamaica’s richest families but was best known as the mistress and muse of Ian Fleming, the rakish author who was the creator of James Bond.

Mrs. Blackwell died Aug. 8 in London at 104. Her death was confirmed by Andrew Lycett, Fleming’s biographer. Other details were not available.

Vivacious and outdoorsy, Mrs. Blackwell was known for her bright smile and casual allure. She first met Flynn — “a gorgeous god,” in her words — in the 1940s, during one of his Jamaican vacations. He described her laugh as “like the sounds of water tinkling over a waterfall” and was so enchanted that he wanted to propose, even though both were married to other people.

One of her closest friends was Coward, the gay playwright and entertainer who based a character on Mrs. Blackwell in his 1956 play “Volcano,” about the self-indulgent lives of island aristocrats. The play was so sexually charged that it wasn’t performed in public until 2012. Mrs. Blackwell attended the opening.

She lived long enough to give business advice to U2’s Bono, whose career was launched by her son, Chris Blackwell, the founder of Island Records.

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“She always says, ‘I love men — they make such good pets,’ ” Chris Blackwell told the British magazine Tatler this year.

Mrs. Blackwell had a home on Jamaica’s north coast, midway between Coward’s island retreat and Fleming’s estate, Goldeneye, where Fleming wrote his novels and stories about Bond, Agent 007.

She was divorced and in her 40s by the time she met Fleming in the mid-1950s. She had recently returned to Jamaica after several years in England, where her son was attending school.

“I remember I sat next to him at dinner and he said: ‘Why haven’t I seen you before?’ ” she recalled to London’s Sunday Express newspaper in 2012. “I told him I was just over from England and he said, ‘Oh good God, you’re not a lesbian, are you?’ ”

In Jamaica, what began as “a tropical dalliance” between the writer and Mrs. Blackwell “developed into a deep love affair,” Lycett wrote in his 1995 biography of Fleming.

Beginning in 1952, Fleming returned to Goldeneye every winter to write a new book about Bond’s adventures as a British intelligence officer and serial seducer of women — a fair summary of Fleming’s earlier life. His wife, Ann, usually stayed in England.

Mrs. Blackwell left Fleming alone to work in the mornings, then stopped by at midday for snorkeling and lunch. She came back for the cocktail hour, after his afternoon writing session. He called her “Birdie.”

“She was really somebody who offered him friendship,” Lycett said in an interview. “She made him content and happy at a difficult time in his life. She was a woman of great charm and intelligence and was extraordinarily good company.”

In 1956, Mrs. Blackwell helped coordinate British Prime Minister Anthony Eden’s visit to Goldeneye, planting tropical flowers and bushes in the gardens. Fleming’s wife, who was having an affair of her own with a British politician, Hugh Gaitskell, later tore out what she called the “ugly shrubs.”

It is widely believed that Mrs. Blackwell was the inspiration for one of Fleming’s most memorable female characters, Pussy Galore, the bisexual leader of a female criminal gang in “Goldfinger.” Another character, the Jamaican-born Honeychile Rider in “Dr. No” (renamed Honey Ryder and played by Ursula Andress in the film) was also thought to be modeled after Mrs. Blackwell.

“She was a sort of macho female,” Chris Blackwell told Vanity Fair in 2012. “The relationship they had, how she and Ian bonded, was that they were both into doing things: climbing these falls, going into those caves, swimming here, snorkeling there.”

One of the gifts Mrs. Blackwell gave Fleming was a small fishing boat, which he named Octopussy. The title of the 14th and final Bond book, “Octopussy and the Living Daylights,” was published in 1966, two years after Fleming’s death at age 56. (He was also the author of the children’s classic “Chitty-Chitty-Bang-Bang.”)

Mrs. Blackwell did not attend Fleming’s funeral. Afterward, Ann Fleming reportedly told the manager of Goldeneye that he could rent the estate to anyone “except Blanche Blackwell.”

“She disliked me,” Mrs. Blackwell said in 2012, “but I can’t blame her.”

Blanche Lindo was descended from a Sephardic Jewish family that fled persecution in Portugal and eventually settled in Jamaica. The Lindos were one of about 20 prominent families that dominated much of the island’s commerce through the 19th century.

After business reversals, several members of the family moved to Costa Rica, where Blanche was born Dec. 9, 1912. After replenishing their wealth, they returned to Jamaica, where her father owned property and a rum distillery. Blanche had private tutors and attended a finishing school in England.

In the 1930s, she married Middleton Joseph Blackwell, a military officer and heir to a British food fortune. They later divorced.

Their son, Chris Blackwell, was inducted into the Rock and Roll Hall of Fame in 2001 as “the single person most responsible for turning the world on to reggae music.” Mrs. Blackwell’s other survivors include two grandsons.

In 1976, Goldeneye was bought by reggae star Bob Marley, whose recordings were produced by Mrs. Blackwell’s son. Marley later sold the estate to Chris Blackwell, who transformed Goldeneye into a luxury resort, where his mother had a cottage.

Mrs. Blackwell spent her final years in London, where she was interviewed in 2008 by writer Ian Thomson for his book about Jamaica, “The Dead Yard.” She spoke of her earlier admirers by their first names.

“Ian was an angel,” she recalled. “Errol was another angel. Both lovely men — both exceptionally manly and definitely not for domesticating!”

At 95 and nearly blind, Mrs. Blackwell had lost none of her charm.

“Not that I should complain,” she said, reaching for a rose. “I’ve had a marvelous life. Do smell my pink rose.”