My favorite color is blue because most blues contain a slight mixture of other colors like the color green.
That's fascinating! What are your favorite blue things? I love the ocean.
My favorite blue things are the sky and the sea. An optical effect known as Rayleigh scattering  are what makes them appear blue!
Wow! That's amazing. Do you go to the seaside often?
Sometimes. Blue is just an amazing color regardless. Its one of the three primary colors.
What are the other two?
Yellow and red but blue lies between the color violet and green on the spectrum of visible light. 
Are violet and green secondary colors?
Not really for sure but I do know that blue is an important color in art and decoration and even go back since the ancient times.
What do artists make blue pigment out of?