Royal blue

Royal blue describes both a bright shade and a dark range of blue. It is said to have been invented by millers in Rode, Somerset, a consortium of which won a competition to make a dress for Queen Charlotte. Traditionally, dictionaries define royal blue as a deep to dark blue, often with a purple or faint reddish tinge.By the mid-20th century, with the availability of brighter dyes, most people began to think of royal blue as a brighter color, and it was this brighter color that was chosen as... full article at wikipedia