I like the color blue. 
It truly is a solid color. In fact, it's one of the three primary colors of pigments that are used in painting and traditional color theory. Even in the RGB color model! So, it provides a lot of foundation to our world.
Really how so?
Well, take the daytime sky and the deep sea, for instance. These things appear blue, but it's actually an optical effect called the Rayleigh scattering. But in essence, there are many "blue" things in our world.
I've never heard of Rayleigh scattering? What does that mean?
Basically what it is is the elastic scatteringof light or other electromagnetic radiation by particles that would be smaller than the wavelength of said radiation. This whole concept was created by a British physicist, Lord Rayleigh.
Oh that's really cool!
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
, take fine lac [red lake], ultramarine blue (the same amount of the one as of the other) with a binder" he noted that it could also be made by mixing blue indigo and red hematite.
In modern color theory, also known as the RGB color model, red, green and blue are additive primary colors. Red, green and blue light combined together makes white light, and these three colors, combined in different mixtures, can produce nearly any other color. This is the principle