The Penitent Blades hail from a world with a landmass made up of thousands of small landmasses suspended kilometres in the air above acidic oceans. How this phenomenon occurs is a mystery, but it has ensured the Penitent Blades are aerial combat experts.
The Penitent Blades primarily wear orange and blue power armour in a quartered livery scheme. The colour of the Aquila or Imperialis worn on the chestplate indicates company assignment in accordance to the dictates of the Codex Astartes.
The black squad tactical specialty symbol -- battleline, fire support, close support, Veteran or command -- is indicated on the right shoulder pauldron. A white High Gothic numeral prominently displayed upon it indicates a battle-brother's assigned squad.
The left shoulder pauldron displays the Chapter's iconography.
It is unknown how the Chapter indicates a battle-brother's company assignment.
The Penitent Blades' Chapter badge consists of three downwards pointing swords centred upon a field of orange.
- Codex Supplement Dark Angels (9th Edition), "Successor Chapters", pg. 27