"Blue" refers to the genetic colour. It is a dilution gene that affects all of the black hair on the dog. All of the skin and hair on the dog that would normally be black, is diluted and appears 'blue'. There are two kinds of Blue seen in this breed. "Gun-metal" blue, which looks like dusty black, or only slightly diluted colouring; and "Powder Blue", which is the lightest and most dramatic change. The eyes are also lightened. Typically amber to yellow, although I have seen the odd set of beautiful green eyes. No other health, coat or skin issues are noted on diluted Malinois, but can be found in some other breeds with the dilution gene.  Our bloodline carries both "Powder Blue" and "Gun Metal Blue" dilutes. While we do not specifically breed to produce 'Blues' , they do appear from time to time.