Selling Colors - Brown, Orange and Yellow/Gold

The most obvious color of coffee are not the most founded packages in stores. In England yellow is associated with ‘Caution’ because it is the second light on stoplights (referring:http://wishcastingsjoerd.blogspot.com) Could this stop consumers of taking the pack off the shell? In America yellow is associated with 'Aging', like yellowed paper. It is true that drinking coffee makes you less more attractive (I am talking about yellow teeth and bad breath) Both yellow and brown aren't the most fresh and colors, like red, blue and white.