Blue is one of the three primary color pigments.
yes, it is, and it is my favourite color too
It's one of my favorites as well. It lies between green and violet in the color spectrum.
yes, you are right, blue has types, can you tell me?
Azure and other styles like light blue and navy blue exist.
ok, what is the origin of the sky blue?
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.
to Isaac Asimov, "It is customary to list indigo as a color lying between blue and violet, but it has never seemed to me that indigo is worth the dignity of being considered a separate color. To my eyes it seems merely deep blue."
Modern color scientists typically divide the spectrum between violet and blue at about 450 nm, with no indigo.
Distinction among the four major tones of indigo.
Like many other colors (orange, rose, and violet are the best-known)