The album has received generally positive reviews, garnering a 71/100 on
Metacritic from 19 reviews.
The A.V. Club, who praised the album highly, remarked, "Reconciling its post-hardcore roots with the progressive-rock flourishes that have been eclipsing the band's sound over the past couple albums, tracks like "Here We Are Juggernaut" and "World Of Lines" far outshine the recent output of Coheed’s closest peer,
The Mars Volta..."
AllMusic, who gave the record a 4 out of 5, concluded that "any fan of heavy progressive rock music may find this music to be of compelling interest, whether one buys into the conceptual nature of the Amory Wars or not." The NewReview rated the album a 4 out of 5 and said "A big portion of the songs on this album are slower in tempo and that makes the listener really analyze the music and appreciate the subtle nuances that this album has to offer." Paul Brannigan of
Kerrang! gave the album four stars out of five and called it "a genuine career highpoint for this most idiosyncratic band".
Time Out New York gave it a score of four stars out of five and said that "the band wisely refines a winning formula, sounding properly bombastic on 'The Broken,' and effortlessly hooky on 'Here We Are Juggernaut.'" Altsounds gave it 86% and called it "a pretty brilliant album".
Alternative Press gave the album four stars out of five and said it "feels every bit as massive as the world it sets up. It's not just the heaviest record in Coheed's arsenal; it's also one of the strongest."
Melodic.net similarly gave the album four stars out of five and said, "Coheed and Cambria always find new ways to bring in their audience and give them all that they have (no pun intended). This is a great album and I think one of their best to date." However, some reviews are average, mixed or negative:
Drowned in Sound gave the album a score of six out of ten and said, "The adventurous nature of Coheed and Cambria was what made them so thrilling. And while this new tangent of popular method could win them a fair few new fans, it may leave some of the loyal wanting more from their next opus."
Q gave it three stars out of five and called it "one space saga that's worth presevering with."
Billboard gave it a mixed review, stating that the album "lacks the grandiose thematic concepts of previous outings as well as an immediate single, like past songs 'A Favor House Atlantic' or 'The Suffering.'"
The Guardian gave it two stars out of five and stated that "Beneath the veneer of baffling musicality, it's evident there's nothing new under the sun, no matter what galaxy you're in."
Slant Magazine lamented, "There's no trace of Coheed's oddball eclecticism here, or of their dynamic pop sensibilities; instead the emotionally and tonally monochrome Black Rainbow gives the impression of a typically humorless metal act." Slant also criticized the album for featuring an "oppressive production job by Atticus Ross and Joe Barressi" that creates "gloomy atmospherics that shroud each and every track".
Rolling Stone met the album with lukewarm reception, commenting on "the same old mix of impressive musicianship and arena-size agita," and that "
Rainbow feels both silly and retrograde." ==Track listing==