Sunshine Challenge: Blue

So these challenges haven't clicked with me so far but this one did:

If you’d like a more specific idea to kick things off: share with us some songs or albums that remind you of the color blue or its theme.

And it reminds me the time of Batman showed off his singing voice in Justice League Unlimited which was done by his regular voice actor Kevin Conroy:

( I AM... BATMAN! (embedded videos under the cut) )

That's all from me. Real blast from the past for me though! :)