Rainbow Warriors

The Rainbow Warriors appeared as an example chapter in Rogue Trader (the first edition of Warhammer 40,000), but there is no mention of them in later editions of the game. They are however illustrated in the Space Marine Chapter Gallery (Games Workshop) as having dark blue armor with a multi-colored rainbow stripe along the center of their helmets.

Due to their appearance in Rogue Trader, they are often erroneously referred to as a First Founding Legion. However, this legion 'apparently' came to the attention of the Ordos Hereticus for some reason unknown and were wiped out to a single company (as read in a White Dwarf). Also in Rogue Trader there is a picture of a Sister of Battle slaying a Rainbow Warrior.

Their chapter symbol is a winged lightning bolt.

A Rainbow Warriors chapter badge is present in the Command Center room on the board of Milton Bradly Games Space Crusade.