My favorite color is blue! It lies between green on violet on the spectrum of visible light. Isn't that interesting?
Yeah, I enjoy looking at the baby blue sky at times. I realize it is an optical illusion though.
It is! Both the daytime sky and the deep sea blue get their colors from an optical effect known as Rayleigh scattering! What is your favorite shade of blue?
Interesting! I would say I really like turquoise. Not sure if that is considered a green or a blue, lol.
Maybe both! Most blues contain some other color. Ultramarine contains some violet and azure contains some green! So maybe turquoise is both blue and green! 
That makes sense to me! I wonder why some people equate blue with sadness?
I'm not sure either, it makes me happy! It's crazy to think that blue is one of only three primary colors of traditional color theory, isn't it? I like a deep, royal blue the best.
Yeah, we can make every other color with just those three colors. Artists only have to buy three colors, lol!
An optical effect called Tyndall scattering explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.
Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments. In the eighth century Chinese artists used cobalt blue to colour fine blue and white porcelain. In the Middle Ages, European artists used
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.