I think black and red, white and red, navy and either green or white, etc diced hose would probably look best if you did not desire solid hose or custom argyles made just for the Black Watch. Personally I have nothing against the matchy matchy navy blue solid hose, but then I don't wear the Black Watch, at least yet. I still have 5 meters of the DW 18oz military weight tartan I have yet to decide what to do with.