Royal blue is both a bright shade and a dark shade of azure blue.
It is said to have been created by clothiers in Rode, Somerset, a consortium of whom won a competition to make a dress for Queen Charlotte, consort of King George III.
The Oxford English Dictionary defines “royal blue” as “a deep vivid blue”, while the Cambridge English Dictionary defined it as “a strong, bright blue colour”, and Collins defines it as “a deep blue colour”.
US dictionaries give it as further towards purple, e.g. “a deep, vivid reddish or purplish blue” (Webster’s New World College Dictionary) or “a vivid purplish blue” (Merriam-Webster).
By the 1950-s, many people began to think of royal blue as a brighter colour, and it is this brighter colour that was chosen as the web colour “royal blue” (the web colours when they were formulated in 1987 were originally known as the X11 colours).
The World Wide Web Consortium designated the keyword “royalblue” to be this much brighter colour, rather than the traditional darker version of royal blue.
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