Starfleet uniform (23rd century)
The Starfleet uniform of the 23rd century could be:
Starfleet uniform (2230s), the Starfleet uniforms used on the USS Kelvin in the early 2230s.
Starfleet uniform (late 2230s-2250s), the Starfleet uniforms used from the late 2230s to the late 2250s.
Starfleet uniform (2250s-early 2270s), the Starfleet uniforms used from the 2250s to the early 2270s. 
Starfleet uniform (alternate reality), the Starfleet uniforms used from the 2250s to the 2260s of the alternate reality.
Starfleet uniform (mid 2270s), the Starfleet uniforms used during the mid 2270s. 
Starfleet uniform (late 2270s-2350s), the Starfleet uniforms used from the late 2270s to the 2350s.