Wikipedia (which is always right because it's on the Internet) says: "Until 1964 Dallas had worn blue at home, but the use of white jerseys was instigated by owner Tex Schramm, who wanted fans to see a variety of opponents' colors at home games." and cites ESPN: The Island of Misfit Unis
The Cowboy’s whole organization sucks from top (GM) to bottom (practice squad). Any resemblance to the Tom Landry era of the Cowboys is purely cosmetical.
They still look like the old Cowboys, but underneath they are are a team living off the past glory and fame of the franchise. They are no longer a team that plays the game to win. Instead, they hope to win just enough games to keep the fans hooked for another season. Meanwhile, the big bucks continue to roll into Jerry’s pockets while the fans remain frustrated for yet another season.
The Cowboys used to be America’s Team. As the memory fades, they will be remembered only as the franchise Jerry Jones’ ego and greed built. You can bet as long as there is a dollar to be made, Jerry Jones will be around to (micro)manage the organization. Sam Michaels is only the latest example.
P.T. Barnum was an amateur compared to Jerry Jones.