Resposta curta: eles não foram descontinuados.
Resposta longa:
Tudo dependia do que eram: stormtroopers, pilotos de gravata, guardas da prisão, etc ...
A partir de Wookieepedia (o artigo cita seis livros-fonte diferentes de Star Wars como suas fontes):
Army and Naval Officers
- Olive grey double-breasted dress tunic and trousers
- Corresponding cover
- Corresponding Battle Dress (Armor, Helmet and black goggles with utility buckle, black belt and duty holster)
- Black leather belt with silver buckle and optional duty holster
- Black leather boots (durasteel-capped)
- Black leather gloves (optional)
- Rank badge on left breast
- Code cylinders located in pockets
Officers in the Stormtrooper Corps, Prison guards, and veteran TIE pilots
- Black double-breasted dress tunic and trousers
- Corresponding headgear
- Corresponding body armor for combat use, just like any other trooper (sometimes with the addition of colored shoulder pauldrons as high-visibility rank indicators when in field units)
- Black gauntlets (optional, as seen on Death Star)
- Rank badge on left breast (without armor, as seen on the Death Star and the Tantive IV, and with Snowtrooper armor, as seen during the Battle of Hoth)
- Black duty belt with silver buckle and utility boxes with optional duty holster
- Code cylinders located in pockets
Death Star Troopers/Naval Troopers (SNCOs)
Senior Non-Commissioned Officers
- Black trousers and double-breasted tunic
- Black gauntlets
- Black open-blast helmet
- Black duty belt with silver buckle; utility boxes and holster
- Black boots
- Firearm-DH-17 blaster pistol (around the Battle of Yavin)
Imperial Gunner (Enlisted)
- Black overalls
- Black gauntlets
- Imperial emblem on each upper arm at the shoulder
- Black enclosed targeting-computer helmet with one white Imperial Emblem on the front
- Black duty belt with utility boxes
Vehicle Command Crews (VCCs) & Senior Enlisted Crewmen (NCOs)
- Light gray single-breasted overalls
- Olive cover
- Battle Dress helmet with black goggles (VCCs- AT-ST Drivers at Battle of Endor)
- Imperial emblem on sleeve at each shoulder
- Duty belt
- Vehicle Command Crews and NCOs were of any rank above corporal
Technicians (Warrant Officers & NCOs):
- Light gray single-breasted overalls (NCOs)
- Black single-breasted overalls (WOs) with black gauntlets (optional)
- Black cover
- Imperial emblem on sleeve at each shoulder
- Duty belt
Não listado na página vinculada, mas também há o uniforme do Grande Almirante, todo branco com dragonas de ouro e faixa preta, luvas pretas e botas pretas.
Até as barras usadas à esquerda, elas eram as barras imperiais:
Muitos dos personagens que aparecem nos filmes seriam sargentos ou outros que usariam cinza, enquanto que em A New Hope havia mais cenas na Estrela da Morte com comandantes de alto escalão e mais tiros de artilheiros, guardas da prisão e outros tipos de pessoal que usaria uniformes de cores diferentes. Em The Empire Strikes Back, não havia muito o que dizer, os oficiais do Corpo de Stormtrooper fora de suas armaduras ou os soldados da Estrela da Morte ou os guardas da prisão aparecerem na tela.
Aqui está uma foto da ponte do Executor do Empire Strikes Back com pelo menos duas, talvez três, cores diferentes representadas:
Aqui estão algumas das cores diferentes representadas em Return of the Jedi quando o Emporer está chegando na Estrela da Morte:
