The color blue is everywhere! Its the color of the sky and the color of water! What would we do without the color blue?
I love it. It's one of the three primary colors of pigments that are the building blocks for all color. 
Yes! There's no purple without blue and no green without blue too!
I find it crazy the human eye can only see blue with a dominant wavelength between approximately 450 and 495 nanometres. Any other wavelength and you can't see it. 
That seems like a very narrow range? Are other colors like this?
I'd imagine all of them. Blue is a crazy color. Do you know blue are are not really blue, a optical effect called Tyndall scattering explains blue eyes.
Can you tell me more about that? I have blue eyes and I love them on other people because they are somewhat rare
They appear blue due to the scattering of light by the turbid medium in the stroma of the iris. 
Interesting, Do you know how rare blue eyes really are? I dont really have a number reference
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
RYB color model
RYB (an abbreviation of red–yellow–blue) denotes the use of red, yellow, and blue pigments as primary colors in art and design, particularly painting.
Color wheel.
RYB (red–yellow–blue) make up the primary color triad in a standard artist's color wheel. The secondary colors purple–orange–green (sometimes called violet–orange–green) make up another triad. Triads are formed by three equidistant colors on a particular color wheel. Other