Chicago Blue

Chicago

Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States and the fifth-most populous city in North America, with a population of 2.74 million at the 2020 census. The Chicago metropolitan area has approximately 9.62 million residents according to the 2020 census and is the third-largest metropolitan statistical area in the country and part of the fourth-largest combined statistical area in the United States, spanning 19 counties in three states and with a population of nearly 10 million. Chicago is the county seat of Cook County, the second-most populous county in the U.S.

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.