"Symphony in Blue" is a song written and recorded by Kate Bush and is the opening track to her second album, Lionheart. It was released as a single in Japan and Canada, where it was second single taken from Lionheart. "Wow" was the second single for the rest of the world.
As with the "Wow" single elsewhere, the "Lionheart" track "Fullhouse" was used as the B-side for the Japanese single. Its picture sleeve was exclusive to this release. For the Canadian release, the single was issued on blue vinyl in a generic (i.e. non-picture) "Harvest" sleeve, with the Lionheart track "Hammer Horror" used as the B-side ("Hammer Horror" was released as a single in its own right elsewhere in the world, notably the UK). A promotional version featured "Symphony in Blue" on both sides, in 'mono' and 'stereo' form.