My favorite color is Blue. It is one of the 3 primary colours
My favorite color is blue as well.  What does primary colors mean?
A primary color is a color that can be combined in varying amounts to produce other colors
My favorite color is blue as well.  What does primary colors mean?
A primary color is when a color can be combined with another color to create other colors 
Interesting!  I didn't know that!  So all colors come from the 3 primary colors?
yes, it is the RGB color model. You can mix red, green, and blue together to produce a broad array of colors. 
I see.  What are the other two primary colors besides blue?