BLUE

It's all dark blue the sky and the sea 
A lovely colour I'm sure you agree 
Blue can also mean you're feeling low
Trying hard not to let the sadness show

Down Australia way blue can be a fight 
Also a red headed person I think I'm right
The boys in blue appear if you break the law
Also a university distinction I'm quite sure 

Should you be really cold you would be blue
Best avoid those dirty movies if I were you
So many uses for blue it has to be said 
Don't even start me on the colour red