In a certain ideology, God (the creator) places the world under the care of seven holy angels, whom he created in seven days.
On Monday He created Angel Darda'il
On Tuesday He created Angel Israfil
On Wednesday He created Angel Mika'il
On Thursday He created Angel Gibra'il
On Friday He created Angel Shimna'il
On Saturday He created Angel Nura'il
And God made Melek Taus (Peacock Angel) the greatest of them and the first to emerge from the Light of God in the form of a seven-rayed rainbow.
Melek Taus and the six Great Angels are collectively the seven colors of the rainbow and Melek Taus became associated with the color blue, because this is the color of the sky and the heavens which is the source of all colors.
When God instructed all archangels to bow to Adam, Melek Taus refused and was punished by being cast down from heaven. He repented of his sin of pride and wept for 7,000 years, his tears quenching the fires of Hell. Melek Taus was pardoned and reinstated as chief of the angels.
Melek Taus, Meaning the Peacock Angel is an emanation of God who created the cosmos from the Cosmic Egg.
Melek Taus is the first out of a series of seven collections inspired by the seven archangels.