Sangre Azul – blue blood – stream of the blue blood cells associated with nobility, hemophilia or zombies;)
“Blue blood is an English idiom recorded since 1834 for noble birth or descent; it is also known as a translation of the Spanish phrase sangre azul, which described the Spanish royal family and other high nobility who claimed to be of Visigothic descent, in contrast to the Moors. The idiom originates from ancient and medieval societies of Europe and distinguishes an upper class (whose superficial veins appeared blue through their untanned skin) from a working class of the time. The latter consisted mainly of agricultural peasants who spent most of their time working outdoors and thus had tanned skin, through which superficial veins appear less prominently”
Nobility. (2016, March 11). In Wikipedia, The Free Encyclopedia. Retrieved 13:02, March 18, 2016, from https://en.wikipedia.org/w/index.php?title=Nobility&oldid=709461526