I tend to wear polo shirts and button-down work shirts, sans tie, with my kilts.

I have a solid black kilt that I often pair up with a white tshirt, black boots and white roll-down socks, though.

The All-Ireland blue is a freaking GORGEOUS tartan, if you ask me. I like it a lot better than I like the usually-seen All-Ireland green. If I had unlimited cash, it would be high on the list of tartans to get.