For me the clerical shirt and collar (or clergy waistcoat or bib stock) are generally sufficient, and I am content to wear the same jackets and doublets as my secular friends and colleagues without any further distinction. My morning dress Argyll jacket is black anyway as is my velvet Sheriffmuir doublet for evening wear. However, the buttons on the Sheriffmuir are antiqued so a duller silver. For day wear, green and check tweeds with antler buttons are fine.

I do have clergy friends and colleagues, however, for whom black is the only colour. Among these all blacks I cant think of any that wear the (tartan) kilt which in itself would break the all-black hegemony. It seems to me that once one is clad in tartan, a bit of silver and additional colour is fairly incidental ... but that's just me and its all a matter of personal taste.

By the way Jock, I didn't know the Church of England was in your neck of the woods. Could this kilt-wearing cleric actually be from the Scottish Episcopal Church? If so, although part of the Anglican Communion and popular with English Christians living in Scotland, definitely not C of E. They were, after all, proscribed by parliament after the '45.