He will be an outstanding breeding stallion for those who like to breed color as he does not have grey in his bloodline. Xadrez is a son of Donaire, one of the top isabel stallions in Brazil. Donaire himself is a son of the black bullfighter stallion Quimono. Quimono is also on Xadrez pedigree from Dam side. 

He is the sire of Dito, another black stallion, who produced lot's of color in Brazil, including many isabel, such as Xadrez's dam Stef. That means that Xadrez is a pure isabel from isabel sire and dam.  He has no grey gene whatsoever.