The Angel Tarot is nothing like a traditional deck of angel cards. The 72 angels of the Kabbalah (or Shem HaMephorash) are extremely powerful heavenly beings that provide assistance to mortals while also ruling over their hellish counterparts, the 72 demons of the Goetia.
When summoning an angel, their sigil (a kind of esoteric calling card) is supposed to be drawn on a piece of pure virgin parchment in red ink. To echo this color palette, the cards are made to look like fresh, pure parchment.
We also suggest you take a look at The Occult Tarot Deck, by the same creator.