text: Yes, it's possible.  \n\nI believe red hair color is a dominant expression of the genes, which can contain either both dominant genes (RR) or one dominant and one recessive gene (Rr).  \n\nSo if both parents have the Rr gene, the the offspring would have 1/4 chances of getting the double recessive genes (rr), and thereby getting the ressive expression of a different (usually lighter) hair color.  \n\nObviously, this is an over-simplification of the human genetics.  See if the bood type checks out.  Or, just get an DNA test to be 99.99% sure.