Assuming no other major changes to the design, I would have suggested these:
- the trousers and stripe are a sort of dark slate grey, rather than straight black (although it’s possible that this may be what they have actually done in the show);
- richer, darker colour for the yellow to better balance the other colours;
- lighter, brighter blue for better contrast with the dark stripe;
- use blue for the stripe on the medical uniforms
(much less stark appearance; acknowledge the historical connection with the sciences uniforms);
- Use silver instead of colours for the details on the collar patch
(the extra colour is rather redundant now...!);
- ...except for the XO, who gets a gold details on the collar patch, same as the captain
(and drop the pips from the collar patch for Captains -- unnecessary repetition).