Personally, I don't particularly care for the all black uniforms -- I think it's pretty ugly. That's probably the ugliest color scheme you could ever have. But I know there's some NFL teams out there that do like to use them because the color black "instills fear" in the minds of their opponents. I like them the way they're at now, with the orange jerseys and white pants with orange trim. But if you have to have those black uniforms, then probably the best color scheme would be to have the black helmets with the black jerseys, with white pants with orange or black trim -- like what Oregon State uses.
Now some idiot is going to come on here and say, "this is digusting, what difference does it make what color the uniforms are -- just so long as we win ballgames."