Thank you all for your ideas.

I can see why Matt and Jock would direct me towards the Claret Hose. It does keep things in the same side of the colour wheel, cool. That is a complementing direction and looks well done.

Forrester, keeping it matching or complimenting and Tobus too though with a caveat of diced.

dbh and X both preferring all Reds a Go.

Is there a place for contrast?

I am thinking also of how I used to wear a tie (and hope to again). Sometimes preferring complementing but for fun, choosing contrasting.

What do you think a good contrasting colour might be against this tartan?

peace,
justin