[3] Moby, the composer of the song, also released his own version of the track in May, with other lyrics and arrangements, called "The Day" and which was the official lead single of his then forthcoming album Destroyed..[4] This simultaneous release created a little controversy amongst fans of Farmer, as many of them criticized the fact that he gave the music to the songstress and then reappropriated it for his own album.

In an interview published on 18 May 2011 in the Belgian newspaper Le Soir, Moby said he was very embarrassed and deemed the release of "The Day" as a single an "error", since Farmer was disappointed, thinking "it was her song".

The words 'blue black' in the title refers to the ink and expresses the idea that when a love story ends, writings are the only things to recalls it.

[7] Directed by producer Olivier Dahan, the music video premiered on the temporary website for the album on 16 March 2011, then was fully broadcast on television two days later.

[8] Regarded as rather "sober" and sometimes "simplistic", with a majority of black and white colors, the video depicts Farmer walking in a countryside, a forest and a snow-covered plains, and ends with a fireworks display.

[16] Sylvain Siclier of Le Monde considered that, alongside "Toi l'amour", "Bleu Noir" is the most pop song of the album, with "light takeoffs, trippy atmosphere", is "close to the musical universal of the singer" and noted that her "voice is particularly present".