Sky Blue can mean anything positive. It is a state of mind.

Name of someone usually with a big voice but small height.

Sky blue is a soft blue, it is for those type of girls that wanted blue, but dont want the actual color blue because its for guys.

This is a response to an obvious question.

the color that no crayon can capture. a color that is never the same everyday. it changes all the time. sky blue is the color of the sky. duh

What you say if something is blatantly obvious so this is a more sarcastic way to answer to that.

"Blue Sky" (also known as Big Blue, Blue Magic, or Fring's Blue1) is the street name which has been coined for the notoriously potent and 99.1% chemically pure crystal methamphetamine manufactured by Walter White and Jesse Pinkman.