Re: Wrath of Khan – my favorite design
Wasn't there something about Bob Blackman doing dye tests with the TMP jumpsuits (which became the cadet uniforms) to see what would take?
IIRC the uniforms could have been blue.
WOK costume designer Robert Fletcher oversaw dye tests of the TMP jumpsuits (since they needed to reuse them), trying a variety of colors. Nick Meyer preferred the maroon over other possibilites.