My favourite colour is blue
That's awesome. A fun fact is that blue eyes are the cause of an optical effect called Tyndall?
I do not know what Tyndall mean. Can you explain on that?
That is the name of the man who discovered the effect. It is an optical effect, but I'm not sure what causes it. 
I see i will read further on it. Do you have a flair for blue color
I do enjoy blue. I find it intersting that most blues contain a slight mixture of other colors.