There are plenty of health reasons that your new baby may be blue. After you've eliminated these possibilities, in consultation with your qualified health expert, if your baby is still blue, consider the following:
1. Your people may be blue, like the Blue Fugates of Troublesome Creek, KY. This is an admittedly rare occurrence, and you'd probably know about it in advance.
2. The tie-dyed pajamas you bought in London have been rubbing off on your child. Wash them separately, in advance, multiple times, and consider buying any future tie-dyed clothing from a larger country, preferably one that supports large populations of roving Dead and Phish fans and many Urban Outfitter locations.