FIRST OF ALL BLUE IS A RECESSIVE GENE.FOR A PERSON TO HAVE BLUE EYES HE MUST HAVE A PAIR OF BLUE (HOMOZYGOUS RECESSIVE GENE).THE DAD HAS TO HAVE ALL HIS GENES, RELATED TO THE EYECOLOR, BLUE.SO THAT MEANS IF THEY BOTH HAVE BLUE EYES THEY CAN ONLY SEND BLUE INFORMATION. YSE THEIR CHILDREN MUST HAVE BLUE EYES