Ask any cosplayer: one of the most enduring aspects of Star Trek is the famous Starfleet uniform. Conceived by costume designer William Ware Theiss, the colourful, instantly recognisable pop art outfit debuted in 1966 in "The Original Series".
First published Sept. 8, 2016.
Update, July 8, 2017: Adds images from "Star Trek: Discovery".
The uniform went through some changes before the show began. Here we see the uniform from pilot episode "Where No Man Has Gone Before", in which William Shatner and Sally Kellerman wear uniforms in the familiar colours but with a different collar.
From "Wrath of Khan" onward, designer Robert Fletcher put the original crew in tunics that nodded to Starfleet's naval tradition, including bell-bottom trousers. The differing colours for differing departments returned on the wrist and shoulder straps and undershirt.
"The Next Generation" began with the crew in form-fitting spandex jumpsuits. The colours return, but this time it's command wearing red, engineering and security in mustard, and science and medicine once again in blue. Unfortunately the futuristic-looking outfits gave some cast members backache.