I only ever knew red 1st & 2nd Parts of Port watch,
Green 1st & 2nd Parts of Starboard.
Some ships gave Blue to watch keepers, (Q.M's & Bosun's amigos ) and Brown to Non watch keepers like Tanky or Gunners Yeo.
I was however once given a yellow card whilst attempting to kill a member of the RAF during an interservices Rugby Football match.:toothy3:
Brown cards were also for those stalwarts of the ships company - Dusties !! ;-P
I had a Blue card for the shorebased events in my career (Lee, Pompey & Chatham), Brown was generally for my sea going days.