I have two self colour kilts: one green, one brown. A kilt doesn't need to be of tartan to be a kilt. Both of them are based on the Scottish kilt and I wear them with sporran, etc. I also have two UKs, no sporran, etc. I mostly wear them to work around the yard or setting up Highland Games. The Scottish kilts and the contemporary ones fell very different to wear, but that's part of the fun of having both kinds.