I've worn a MacIntyre tartan tie with a different MacIntyre tartan kilt and lived to tell the tale. I had a ceilidh to attend in Scotland and neglected to pack a solid long tie; so, I threw on the tartan tie that I had purchased on a lark earlier in the day. This was for the Clan MacIntyre Gathering and the Scottish MacIs that attended wore their semi-formals, so it was a mixed bag of dress, anyway.