Lyric discussion by andymac24 

Cover art for Blue Lips lyrics by Regina Spektor

I can't believe nobody can see that blue is the colour of sadness? "I'm feeling blue"? "The Blues?"

Blue - the colour of our plant from far far away? - everybody's unhappy. Blue, the most human colour; the most human emotion. Captain Obvious.

...?

A few problems with your argument:

1) People here have already stated they believe that the color "blue" is meant to represent sadness in this equation before you decided to comment.

2) You do realize that songs can be interpreted in a variety of ways, including the color blue? In fact, studies show that when our minds process the color "blue," our heart beat slows, giving us a sense of mellow contentment--not sadness.

Anyway, unless you've spoken to Regina herself and asked what the song meant, I don't think you should be taking such a high and mighty...