Crimson Moonlight's lyrics deal with Christian topics, often Biblical imagery, metaphors and symbolism. The texts also feature spiritual visions. For example, the band's name, "Crimson Moonlight" means the moon turning bloodred, a divine pre-apocalyptic vision predicted in the Bible's Old Testament in the Book of Joel 3:4. The topics emphasize on apocalyptical End Times and spiritual warfare. The themes are typically melded with poetic imagery of the Scandinavian nature and wintry landscapes.

Crimson Moonlight's critical reception has been overtly positive: For example, the biggest Finnish metal music website Imperiumi.net credits the band for "playing black metal better than most of their anti-Christian colleques." The same reviewer writes that the debut album "The Covenant Progress may not be a masterpiece but it is still damn good melodic black metal." The biggest metal magazine in Sweden described Veil of Remembrance as: "Great played black metal, grinding forth in a furious speed and eagerness& If the word intelligent ever can be used in the genre, this is a perfect example."[10] The Metal Observer gave the album 9/10 and wrote that Crimson Moonlight is "on the verge of mastering this Black/Death hybrid style they’re peddling."

Currently Crimson Moonlight is one of the leading groups in the Christian black metal movement. As evidense of that, in March 13, 2008, Blabbermouth.net reported that Crimson Moonlight, together with groups such as Admonish, and Frosthardr will be featured on a documentary film on Christian black metal entitled Light in Darkness - Nemesis Divina which is currently in production and is set to be out by Summer 2008