Simple answer is No. If they were all the same, it would be impossible to tell guys apart on a scene. There is something to be said for a little variation. Whether it is the gear color, or just the striping.
We have had Black turnouts for as long as I've been Chief (18 years). I have always liked them and would not change unless I felt there was a good reason beyond what we do now. They are Black with Glowflex tripple trim. They do not show all the stains and stuff that gets on them. We have them laundered regularly and they continue to look professional and clean. Besides that the troups like them. What more can I ask?
NO. Different coat colors helps with FD accountability ID. We have tan with orange stripes.
* Now helmets on the other hand, that's another problem. There should be a national standard in helmet color id...White Chief Officer, Red Captains, Yellow LT, Blue Safety Officer, etc. It would be so much easier and uniform. This will surely raise some heck.