Blue is my favorite color of all time.
Me too. I love to use it while painting and it's used a lot since it's one of the three primary colors.
What does it mean to be a primary color?
A set of real colors that can be combined to produce other colors.
Cool. What are the other 2 primary colors?
Red and yellow. 
Oh ok, so red and yellow make orange, blue and yellow make green and red and blue make purple right?
I'm not sure I only know that most blues contain a slight mixture of other colors. For example azure contains some green.
That's interesting to know!
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