All politics and history (imagined or real) aside, but simply as a matter of fashion and availability, I've noticed that Glengarries are usually made in two colours, an extremely dark blue which comes with a scarlet tourie, and black which is available with either a black or scarlet tourie.

Nearly every civilian pipe band on earth has a mix of blue and black Glengarries, and many bandsmen the world over are not aware of the difference.

Likewise nearly every civilian pipe band has a mix of black and scarlet touries.

But as part of the "Matchy matchy" thing, many bands opt for a custom tourie colour, usually sky blue or royal blue, or green for Irish bands. This never really works, because invariably some band members are wearing scarlet or black touries, no matter how hard the band tries to get everything matching.

I think I've only seen yellow touries on a couple bands wearing Buchanan or Allan Brothers MacLeod.