Magnoli Clothiers Star Wars Imperial Officer Uniform (Extra Yard of Fabric) Olive-Grey at Amazon Men's Clothing store
Star Wars movie costumes and historic military uniforms. Outfits of the Imperial people based on Nazi uniform? - Nationalclothing.org
Star Wars Premium Imperial Officer Costume for Women
It's not that big of a deal, but imperial stormtrooper officers wore black uniforms. Gray uniforms like in this game were worn by navy officers : r/StarWarsBattlefront
Why were all the basic imperial uniforms starting in The Empire Strikes Back gray? - Science Fiction & Fantasy Stack Exchange