I have attended two funerals in recent months while kilted, both for men who were themselves kilt wearers and actively involved in Scottish heritage activities, so there were many kilted men there to pay their respects.

I tend to dress traditionally but conservatively, avoiding any accessories that would look to flashy.

For the first funeral I wore my Duke of York tartan kilt, and this jacket:

It is a very dark navy blue, which toned well with the kilt. I think I also wore the same tie (no red pocket square, though). I wore the same black leather sporran in the above photo. So really, the only thing different was the kilt and lack or pocket square. I forget what hose I had on but I think they were plain navy blue. Black leather shoes.

At the funeral I most recently attended (only yesterday) I wore my St. Ninian tartan kilt, but the same jacket, and a very similar tie to the one pictured. Same sporran. Navy blue hose.

Other men there were in typical black Argyle jackets. That was perhaps the most common choice. Though there were quite a few tweed jackets worn, as well. I almost wore one of my tweed jackets, but opted for the light weight navy blue one, instead, at the last minute.

I only saw one Prince Charlie jacket worn, and to be honest it looked out of place.

There were only two kilted men there that I did not think were dressed appropriately. One had on a Jacobite style "kilt shirt," and the fellow he was with was wearing a feilidh-mhor, Jacobite shirt, and a Ren Faire style sleeveless waistcoat. In fact they looked more like they were dressed for a Ren Faire than a funeral. I'm sure no one said anything to them about it, but I did have a few non-kilted people ask me why they might be dressed that way - it was obvious that they were not dressed like most of the other kilted men there.