I think I see dark collars, dark cloth shoulder straps (epaulets wuthering out fringe, but fringe on the officers). I also think I see two buttons on the coat sleeves. At least the officers might have what I call 'French' cuff with flashes on their sleeve. These flashes covered where the sleeves could open, originally to reenfoce the flap and to prevent fraying, but by the Civil War many of these were purely decorative and the sleeve cuffs did not open (false flashes or false button patches).
The officers in the image may have false button hole trim, again originally used to prevent fraying about the button holes. It was fairly common for both officers and enlisted to have these 'French' cuffs with false button hole trim, often the offices had more buttons on the sleeves than the enlisted men.
For our forum members who are not uniform people. 'Polish' cuffs had pointed turn backs on the cuffs so the cuffs could be unbuttoned and pulled down over the top of the hand to keep it warn. But leave the fingers free to fire the musket. "'French' cuffs might or might not have a cuffs that could be turned down. 'German' cuffs were usually a strait turn back. By the Civil War many turn back cuffs were unfunctionable and were just cloth decorations. See the US Army frock coat points cuffs and the turn back were nothing more than a pointed cord trim. Some Army frock coats did have cuffs that opened.
Again perhaps a real uniform expert will comment and correct me.