(Reuters) - In a bid to reverse a decade-long slide in sales, some producers of Port wine have gone pink. They have given the sweet red or amber colored Portuguese fortified wine, which is traditionally sipped as an accompaniment to the cheese course or dessert, a makeover with a lighter rosé version that is 20 percent alcohol. "It's port without rules," Adrian Bridge, chief executive of Taylor-Fladgate in Vila Nova de Gaia, Portugal, said of his rosé, Croft Pink. His 320-year-old, family-owned port house, which also has the Fonseca and Croft brands, was the first to make a rosé port in 2005 though others, including smaller producers Poças and Krohn, have followed suit.