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Related to bluish: bluish green

blue

1. any of a group of colours, such as that of a clear unclouded sky, that have wavelengths in the range 490--445 nanometres. Blue is the complementary colour of yellow and with red and green forms a set of primary colours
2. 
a. a sportsman who represents or has represented Oxford or Cambridge University and has the right to wear the university colour (dark blue for Oxford, light blue for Cambridge)
b. the honour of so representing one's university
3. Brit an informal name for Tory
4. any of numerous small blue-winged butterflies of the genera Lampides, Polyommatus, etc.: family Lycaenidae
5. Archery a blue ring on a target, between the red and the black, scoring five points
6. a blue ball in snooker, etc

blue

[blü]
(optics)
The hue evoked in an average observer by monochromatic radiation having a wavelength in the approximate range from 455 to 492 nanometers; however, the same sensation can be produced in a variety of other ways.

blue

in American flag, symbolizes justice. [Color Symbolism: Leach, 242; Jobes, 356]
See: Justice

Blue

A language proposed by Softech to meet the DoD Ironman requirements which led to Ada. ["On the BLUE Language Submitted to the DoD", E.W. Dijkstra, SIGPLAN Notices 13(10):10-15 (Oct 1978)].
References in periodicals archive ?
3, 2015 /PRNewswire/ -- A Radiant-cut Type IIa Fancy Intense Purple-Pink diamond ring and an Emerald-cut Fancy Vivid Bluish Green diamond ring are available by private appointment at selected jewelry stores nationwide.
The bluish color may have helped camouflage eggs laid in open nests, the authors suggest.
Bruises are bluish or purplecoloured patches that appear because tiny blood vessels beneath the skin burst and leak blood into the soft tissue.
BASF also launched Paliocrom Sparkling Red as an exclusive bluish red product in the market.
Carmine had been traditionally used to achieve bright red to bluish pink hues in many dairy and fruit ice preparations.
According to the company, the high jetness and bluish undertone make it suitable for automotive OEM and refinish systems.
These reveal an increasing fascination with white, characterized by the development of many individualized shades of white, among them milky white, snow white, greyish white, and bluish white.
Q I recently bought an older house and the windows have a slight bluish tint outdoors on sunny days.
The nebula has a knotty and filamentary structure surrounding bluish lobes.
The unnamed officer, an acting sergeant with West Midlands Police, described a "mysterious light with a bluish tinge" which was "pulsing rhythmically" before shooting away out of sight.
The lighting, based on field-induced polymer electroluminescent (FIPEL) technology, also gives off soft, white light - not the yellowish glint from fluorescents or bluish tinge from LEDs.
5 cm in length and is darkly coloured, sometimes with a bluish sheen.