Nancy Reagan's Clairol Connection

Only her hairdresser -- and umpteen million readers of "Doonesbury" -- know for sure what Nancy Reagan's hair coloring formula is.

In an imaginary te te-a -te te in last Sunday's comic strip, Mrs. Reagan and Julius Bengtsson, first hairdresser to the first lady, chatted at the White House about the Clairol formula and his Clairol connection. Bengtsson, who has been Mrs. Reagan's stylist for years, is a consultant to Clairol, and uses his fee to pay for his once-every-three-weeks visits to Washington to retouch the first lady's hair.

Last week the Clairol hotline was dispensing the precise formula for the First Color: 1 1/2 ounces Miss Clairol Moon Gold and 1/2 ounce Miss Clairol Chestnut.

The day after the strip ran, the hotline was warning callers not to expect to get Mrs. Reagan's hair color just from this product mix. "Don't forget that Mrs. Reagan has her hair professionally highlighted after the color treatment," one operator said. "Mrs. Reagan has got a lot of gray hair," she volunteered.

Apparently Mrs. Reagan was gaining no gray hair over the "Doonesbury" strip. "I don't read Garry Trudeau," she said. Father-Of-Pearl?

If real men are wearing earrings and skirts, why not pearls?

In fact, men do wear pearl cuff links, even pearl studs. And didn't Alexander the Great, Henry VIII and Charlemagne wear pearls?

Now designer Takashi Wada has made a pearl rope tie and pin to wear with a not-so-basic black-and-white smoking jacket and Jacquard shirt by Fabrice. Fur Fun

It's no surprise that Karl Lagerfeld, who is irreverent yet practical with his fur designs for Fendi, takes the same attitude with the fake fur styles he has included in his American sportswear line. He has used a new fake mink called Furtastic, developed by Toray Industries, the company that developed Ultrasuede, in a cropped jacket, three-quarter coat and long coat, all with wide kimono sleeves to fit over the new clothes for fall, including Lagerfeld's own new collection, KL Sportswear. Tooth To Tell. . .

According to an article in the American Journal of Orthodontics, people with straight teeth are viewed as friendlier and more sexually attractive.

A Manchester, England, orthodontist asked more than 800 young adults to rate subjects according to their portrait photos. Some of the photos were duplicates -- except for the teeth, which were doctored to look crooked. As a result of the survey, the dentist concluded that persons with straight teeth appear to be more "socially desirable" . . . at least in a first glance athe photo. Ruffles, Anyone?

Seven young American tennis players modeled prissy white tennis clothes at Wimbledon recently as alternatives to the controversial outfit worn by player Anne White. Several of the ensembles included lace bloomers, others ruffled tops and tiered skirts.

But none was nearly as modern and sensible as White's long, white stretch bodysuit that Wimbledon officials banned for future wear in the tournament. Blass Is Back

No BB signatures on the pajamas and robe Bill Blass has been wearing in the hospital last week. Blass was visiting John Fairchild, big boss at Women's Wear Daily, at his house in Provence in France when he had a gallbladder attack. He flew directly to New York hospital, bypassing his closet-full of BB garb, for a successful operation and recovery. He's due home from the hospital today.

No word yet on whether Blass will make it to Washington for his annual luncheon and selling blitz at Neiman-Marcus. Karen Davis, Sans Sweaters

A few surprises in sweater designer Karen Davis' suitcases when she packs off on the QE II this week. Billed as guest artist-concert pianist for the trip, she won't have a single Peruvian hand-knit sweater from the current collection with her. "The current cotton line for spring '86 is on the road with the sales crew, and they wouldn't let me borrow even one for my trip," Davis said.e for spring '86 is on the road with the sales crew, and they wouldn't l

The current collection of sweaters, called Amano, is just arriving at Saks Fifth Avenue and Britches for Women. Summer: Is There Life In the Hair After?

"Summer is the worst and the best time for hair," says trichologist (scalp and hair expert) Philip Kingsley. "People tend to be more relaxed and avoid the stress which can harm air. They eat better and they wash their hair more often. But summer hair suffers from exposure to the lethal combination of chlorine and sun."

Londoner Kingsley, who practices the science of trichology -- including aspects of dermatology, nutrition, chemistry and hygiene -- in his New York and London clinics, made a guest appearance at the Elizabeth Arden salons here last week.

"Clients come to me in September with their hair in the most appalling condition from a summer of neglect," he says. "People wouldn't think of going into the sun without skin protection. Your skin is replaced every 28 days, but your hair only grows 6 inches a year."

Among Kingsley's clients are actors and models whose careers expose their hair to constant teasing, curling and exposure to heat. Joan Collins, Audrey Hepburn, Mick Jagger and Candice Bergen are clients. So is Cher, whose hair has metamorphosed from Mohawk to platinum blond to a jet-black spiky punk style in recent years. "That's why she needs me," says Kingsley.