BLUE CLUES: While associated with the avant-garde, Hussein Chalayan is bringing his design touch to an everyday item: jeans. The London-based designer has signed a collaboration deal with premium denim firm J Brand. The women’s styles will be for fall retailing, and the firm’s principals were front row at Chalayan’s show on Sunday. Also new for next season are sneakers made by the designer’s parent Puma, said Chalayan chief executive Giorgio Belloli. The thigh-high boots and sexy pumps stalking the runway were made by Sergio Rossi, part of PPR’s luxury arm, Gucci Group. Meanwhile, actress sisters Clotilde and Annelise Hesme are looking forward to playing opposite each other for the first time in “Un Coin Calme,” but not as sisters. “We play complete opposites: two women who meet in extreme circumstances,” said Clotilde.