Blue Cue

Blue

Blue is one of the three primary colours in the RGB (additive) colour model, as well as in the RYB colour model. It lies between violet and cyan on the spectrum of visible light. The term blue generally describes colours perceived by humans observing light with a dominant wavelength between approximately 450 and 495 nanometres. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called the Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.

blue

Adjective

1. Of a blue hue.
2. Depressed, melancholic, sad.

Noun

1. The colour of the clear sky or the deep sea; the colour midway between green and violet in the visible spectrum and one of the primary additive colours.
2. Anything coloured blue, especially to distinguish it from similar objects differing only in colour.

cue

Noun

1. The name of the Latin script letter Q/q.
2. A small portion of bread or beer; the quantity bought with a farthing or half farthing and noted with a q (for Latin quadrāns (“farthing”)) in the buttery books.

Noun

1. An action or event that is a signal for somebody to do something.
2. The last words of a play actor's speech, serving as an intimation for the next actor to speak; any word or words which serve to remind an actor to speak or to do something; a catchword.