Is there an established rule for Star Trek uniforms through the ages?

When the original series came out, it was right at the beginning of colour television, and they wanted to make a point of colour television, so stronger colours were used just to emphasise that.William Mortice in his designs used a lot of modern pop fabrics, art fabrics, sort of psychedelics. There was a lot of very strong colour - very strong gold, the strong red, to that chartreuse - I mean, Lord, I think of that as strong colour! We could never got that colourful on any of our principal characters. We�ve set up a time line, and as we advance on that time line, I feel very obligated to keep a sort of historic record. So, as the uniforms have changed, over the three series that I�ve worked on, I�ve kept a colour palette - that sort of wine, burgundy, red, is for command, gold is for tactical and security, the sort of teal blue is medical and science. So I�ve kept those categories the same throughout.