I like the claret!

With the tartan itself having plenty of green, and with the Prince Charlie and shirt having plenty of black and white, your outfit doesn't need any more of those colours.

In addition the tartan is rather muted in its colours.

So my preference would be to go with a bold colour: red, claret, royal blue, even purple or golden yellow.

As always, I feel that it's best to avoid using one of the kilt's main colours, the "ground" colours if you will, for the hose.

Black, white, and grey are "safe" because they never clash, but neither do they add anything to the overall "look".