Sky blue is a colour that resembles that of an unclouded sky around noon (azure) reflecting off a metallic surface. The entry for "sky-blue" in Murray's New English Dictionary (1919) reports a first sighting of the term in the article on "silver" in Ephraim Chambers's Cyclopaedia of 1728. However, many writers had used the term "sky blue" to name a colour before Chambers. For example, we find "sky blue" in A Collection of Voyages and Travels (London: Awnsham and John Churchill, 1704), vol. 2, p. 322, where John Nieuhoff describes certain flowers: "they are of a lovely sky blue colour, and yellow in the middle". The sense of this colour may have been first used in 1585 in a book by Nicolas de Nicolay where he stated "the tulbant [turban] of the merchant must be skie coloured".
|boys, daylight, water, air, paleness|
|sRGBB (r, g, b)||(135, 206, 235)|
|HSV (h, s, v)||(197°, 43%, 92%)|
|CIELChuv (L, C, h)||(79, 46, 223°)|
|Source||X11 color names|
|ISCC–NBS descriptor||Very light greenish blue|
|B: Normalized to [0–255] (byte)|
Displayed at right is the web colour sky blue.