My favorite color is blue, there's so many pretty shades to choose from.
Blue is also my favorite color.  How many shades of blue are there?
I'm not sure but it covers all the colors between violet and green on the spectrum of visible light.
Wow, that's interesting.  What else do you know about blue?
I know that distant objects appear more blue because of an optical effect called "atmospheric perspective"
That sounds wild.  Where did blue come from like dyes?
Most dyes are derived from plant sources, blue is derived from indigo
I think sapphires are also blue. Right?