The Storm Hawks primarily wear white Power Armour. The Aquila or Imperialis on the chest guard is red. The red squad specialty symbol on the right shoulder guard designates operational specialty -- Tactical, Devastator, Assault or Veteran. A white Roman numeral is stenciled on the centre of the squad specialty symbol which indicates squad number. The colour of the left knee guard indicates company number in accordance with the dictates of the Codex Astartes -- i.e. White (1st Company), Yellow (2nd Company), Red (3rd Company), Green (4th Company), etc.