My favorite color is blue, whats yours?
Yes  mee too, Its primary colour. It lies eween violet and gree
It is also a color that calms a person when they look at it according to color psychology.
Yes, The clear daytime sky and the deep sea blue because of an optical effect
Yeah that is correct! In ancient Rome, blue was associated with barbarians
ok ,the eye preceives blue when observing light with a dominant wavelength
Blue was the symbolic color of the French Revolution, but France had trouble maintaining a large enough supply of indigo dye to keep its military dressed in blue
it in the windows of cathedrals. Europeans wore clothing coloured with the vegetable dye woad until it was replaced by the finer indigo from America. In the 19th century, synthetic blue dyes and pigments gradually replaced mineral pigments and synthetic dyes. Dark blue became a common colour for military uniforms and later, in the late 20th century, for business suits. Because blue has commonly been associated with harmony, it was chosen as the colour of the flags of the United Nations and the European Union.
Surveys in the US and
Blue
Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour 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 colours; 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.