Coresca: Reign of the Gods
A subset of spirits that are comprised of former Ascendency members. Their robes depict the colors of the native deity they served in life. Even in death they are said to come to the aid of the faithful/ While there are 13 colors of robe that these spirits wear, there is a 14th "variety" which wears the an incredibly muted color of it's former deity.
Known as the colorless, these are Ascendency members who had fallen from grace and were stripped of their title and "color". A large colony of colorless resides on Kithrana but they can be found throughout the multiverse. Not much is known of the colorless apart from that they slowly descend into madness after being turned into a colorless spirit.