It is remarkably difficult to actually capture that 'mustard yellow not gold but not brown' colour of the TOS Command Division shirts in miniature. That's without going into that tale of the shirts supposedly being lime green 'but showing up yellow under cameras.' Oh yeah? Then how come promotional stills were shot with different cameras and lighting and still looked yellow?
... 3 parts Tan Yellow and 1 part Beige from Vallejo seems to be pretty close, if that helps.