Red tunics revisited

[Rubus]

We know that marines wore blue tunics. But I would be surprised if they wore them because of characteristics like harmony, coldness or sadness which are associated with the colour blue ...

We don't really know it.Entire idea is mainly based on short passage in late 4th early 5th century Vegetius who only mentioned that Roman marines serving at Britain were using speciffic shade of blue on their service dress as well as on Ships and its canvas as a kind of camouflage.But Vegetius is not anyhow clearly saying if this was just speciality for marines serving in Britain only or if it was normal general practice used also at other Roman navy soldiers.

I didn't want to imply (and don't believe) there was a uniform blue for Roman marines at all times just that we know of marines who wore blue Seems to be a bit misleading now that I read it again.