I wasn't sure if it worked with barred rock hens and ANY rooster (have three EE roos running around)...the only info I could really find was making black sex links and that was usually using a RIR roo. I have a mostly black roo, mostly red roo, and a mostly white/grey roo and any one of them could have been the father of the chicks.
CG
Look up Sex-linked information thread . Start on page1 for the basic information and traits. Any of those roosters will create a sex link with barred hens. Without the barring the hens are black the black is going to dominate the other colors . Chicks from any of those roosters and barred rock hens will be mostly black at hatch. The white / grey is probably the poor choice for sex links. He may carry silver or Columbian or both . Should not affect the outcome but not sure . Barring does not show well on white or yellow chicks . So buff and wheaten are poor choices.