Here is wikipedia's entry on the first U.S. lawsuit that established that color could be trademarked: http://en.wikipedia.org/wiki/Qualitex_Co._v._Jacobson_Produc....
Here is wikipedia's entry on the first U.S. lawsuit that established that color could be trademarked: http://en.wikipedia.org/wiki/Qualitex_Co._v._Jacobson_Produc....