Dark Blue is the second single by Jack's Mannequin from their critically acclaimed first studio album, Everything in Transit. In May 2013, nearly 8 years after its 2005 release, Dark Blue went gold.

When interviewed by Suburban Horror, McMahon stated that the song was his favourite from the Everything In Transit album.

It was as the last song I wrote on the record. I always find that my favorite song is the last one that I worked on. I think that song for me sums up the record in a lot of ways. I wrote it to do that...

The music video features a traditional 1950s dance marathon. The video begins with an ecstatic crowd competing in the marathon with the band playing the song in the centre of the gazebo. It then proceeds to show the crowd growing steadily exhausted, with many contestants disqualified for falling down. Observers take bets on who will win the competition. As the video draws to a conclusion and there are only two couples remaining, the girl of couple 55 (portrayed by House and Once Upon a Time actress Jennifer Morrison) slumps to the ground and they place second. The winning couple is cheered by a large crowd, while couple 55 are escorted to the edge of the ship by a pair of guards. They then proceed to jump from the edge.

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Wikipedia