Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model. It lies between violet and green on the spectrum of visible light.
Bluetooth is a wireless technology standard for exchanging data over short distances from fixed and mobile devices, and building personal area networks (PANs). Invented by Dutch electrical engineer Jaap Haartsen, working for telecommunications company Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables.
Blues is a music genre and musical form originated in the Deep South of the United States around the 1870s. The genre developed from roots, and spirituals.
The blue whale is a marine mammal belonging to the baleen whale parvorder, Mysticeti. At up to 29.9 metres (98 ft) in length and with a maximum recorded weight of 173 tonnes (190 short tons), it is the largest animal known to have ever existed.Long and slender, the blue whale's body can be various shades of bluish-grey dorsally and somewhat lighter underneath.
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