blue http://id.loc.gov/authorities/subjects/sh85015053 http://purl.bioontology.org/ontology/SNOMEDCT/405738005 http://purl.obolibrary.org/obo/NCIT_C48333 https://en.wikipedia.org/wiki/Blue https://www.wikidata.org/wiki/Q1088 One of the three primary colors of pigments in painting and traditional color theory, as well as in the RGB color model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colors; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall scattering explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Surveys in the US and Europe show that blue is the color most commonly associated with harmony, faithfulness, confidence, distance, infinity, the imagination, cold, and sometimes with sadness. In US and European public opinion polls it is the most popular color, chosen by almost half of both men and women as their favourite color. The same surveys also showed that blue was the color most associated with the masculine, just ahead of black, and was also the color most associated with intelligence, knowledge, calm and concentration. The hue of that portion of the visible spectrum lying between green and indigo, evoked in the human observer by radiant energy with wavelengths of approximately 420 to 490 nanometers; any of a group of colors that may vary in lightness and saturation, whose hue is that of a clear daytime sky. blues color blue http://id.loc.gov/authorities/subjects/sh85015053 http://purl.bioontology.org/ontology/SNOMEDCT/405738005 http://purl.obolibrary.org/obo/NCIT_C48333 https://en.wikipedia.org/wiki/Blue https://www.wikidata.org/wiki/Q1088 One of the three primary colors of pigments in painting and traditional color theory, as well as in the RGB color model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colors; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall scattering explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Surveys in the US and Europe show that blue is the color most commonly associated with harmony, faithfulness, confidence, distance, infinity, the imagination, cold, and sometimes with sadness. In US and European public opinion polls it is the most popular color, chosen by almost half of both men and women as their favourite color. The same surveys also showed that blue was the color most associated with the masculine, just ahead of black, and was also the color most associated with intelligence, knowledge, calm and concentration. The hue of that portion of the visible spectrum lying between green and indigo, evoked in the human observer by radiant energy with wavelengths of approximately 420 to 490 nanometers; any of a group of colors that may vary in lightness and saturation, whose hue is that of a clear daytime sky. blues