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!
Yeah, also in the eighth century Chinese artists used cobalt blue to paint white porcelain.