Was the “granny trend”—where women of all ages colored their hair shades of silver and gray just a media craze? According to Kline Pro, the company’s product-level database, hair colorant sales within the brights and silver shade groups rose 46% and 14%, respectively, in 2014. “It’s exciting to see current market trends reflected in our data,” remarked Paula Gottdiner, Kline’s manager of the program. “We’ve been busy building our panel and are currently reporting on about 1,000 independent sa...