In paintings, Mary is traditionally portrayed in <answer>blue</answer>. This tradition can trace its origin to the Byzantine Empire, from c.500 AD, where <answer>blue</answer> was "the colour of an empress". A more practical explanation for the use of this colour is that in Medieval and Renaissance Europe, the <answer>blue</answer> pigment was derived from the rock lapis lazuli, a stone imported from Afghanistan of greater value than gold. Beyond a painter's retainer, patrons were expected to purchase any gold or lapis lazuli to be used in the painting. Hence, it was an expression of devotion and glorification to swathe the Virgin in gowns of <answer>blue</answer>.
Which color is traditionally used to portray Mary in paintings?
blue