A federal jury Monday ordered the sellers of Rockwell power tools to pay $54 million for using the yellow-and-black color scheme of a rival brand.Jurors deliberated for about four hours before returning the $54,074,815 verdict in favor of The Black & Decker Corp. and two subsidiaries.The eight-member jury determined Positec USA Inc. and RW Direct Inc. infringed both the trademark and the trade dress of Black & Decker’s DeWalt line of tools.U.S. District Judge Robert M. Dow Jr. set a Nov. 2 deadline for filing …