To Be Bred In The Purple Means To Be Of Royal Or Princely Parentage
Categories:
Live Stock and Dairy
It originally was used in reference to the nobility of Europe, as purple
was the insignia of royal blood, due to the fact that purple was the
rarest and most costly color and only the rich and noble could buy it.
When used in referring to live stock, it signifies that the animal in
question has a long line of blooded ancestry.