I think blue is such a beautiful color! It's one of the three primary colors!
Blue is an excellent color! What color would I have to combine it with to make purple?
Red! You can also mix blue with green to make azure and blue and violet to make ultramarine! It's a very versatile color!
Amazing! how does crayola create all these different colors when there is only 3 primary colors?
Exactly! I recently learned that the sky and deep sea only appear blue because of and optical effect called Rayleigh scattering. 
Rayleigh scattering sounds quite scientific. I don't know much about it.
It's a pretty complicated concept! Another crazy concept is the spectrum of visible light! Blue actually lies between violet and green on the spectrum.
Is blue near the end of the light spectrum?
I believe that it is! I think violet is at the end of the spectrum, like in a rainbow!