Starfleet uniform (2230s)
The Starfleet uniform of the 2230s was drastically modified from the design used in the mid-22nd century. The outfits were designed as tight-fitting bodysuits with black piping running across the front of the yoke and onto the upper sleeves. A Starfleet insignia or assignment patch was worn on the upper left breast pocket. There were at least three division colors: blue for the command division, including tactical, a greenish gold, presumably engineering, and a pearl grey, which was presumably non-medical sciences and/or security. The medical staff wore white. ()

Duty uniforms 
The duty uniform consisted of a tight fitting shirt with black piping running across the yoke and down the sleeve until the elbow. These shirts were divided into the three division colors, and came with appropriately colored pants. The pants themselves had two pockets on the front and were worn with a gold belt and buckle to which a communicator could be attached. Rank was displayed on the sleeve cuffs. ()

Rank insignia

Medical uniforms 
A series of white medical uniforms were also worn during this period. These were produced in several varieties, all of which featured white shoes and bore assignment insignia in the same location in which it was worn on duty uniforms. One variety consisted of an almost knee-length, high-collared white tunic worn over white trousers. The tunic featured a mandarin collar, and could be worn with a thin, white plastic-like coat. A second type consisted of a single piece tight, knee-length skirt/tunic with a wide, open collar. Unlike other uniforms of this period, these uniforms featured closures along the left side, which ran from the collar along the shoulder and down the side of the torso.

Two varieties featured untucked hip-length folded-collared shirts, similar in design to those popular in 20th century male formal wear on Earth. Both varieties included white trousers and a clear plastic-like outer shirt worn over the white uniform shirt, excepting the folded collar, and were fastened under a thin flap along the front of the shirt. They differed only in the length of the sleeves of the white shirt portion of the uniform. ()

Section 31 uniform 

The uniform worn by Section 31 members at this time was similar to the standard Starfleet duty uniform but had no division coloring, just a simple black body suit with the Section 31 Starfleet insignia on the left breast. ()

Appendices

Background information 
The 2230s Starfleet uniform was designed by Michael Kaplan. The design and look of the uniforms was inspired by science fiction movies of the 1950s. (Star Trek Magazine issue 146) Belt buckles and subdued colors were chosen to create a bridge between contemporary attire and the uniforms worn by Kirk's crew. (The Art of Star Trek: The Kelvin Timeline, p. 15)

Apocrypha 

Star Trek: Countdown to Darkness, Issue 2 depicts this style of uniform was phased out by at least 2239 in the alternate reality, and replaced with a new design.

External link 
 
de:Sternenflottenuniform (2233)
Starfleet uniform 03
Alternate reality