Lemme see. A tropical shirt draws attention to itself.
And a kilt…

I think…
That’s a good-looking tropical shirt!
It looks good tucked in!
I like that the black background matches the kilt.
I’d probably do a roller buckle rather than the rectangle.
And a Tiki kilt pin, representing “Clan Tiki Bar” of course.

There are lots of tropical “shadow prints” that would look good also.

Sideways to Topic Tale:
I go off and on with prints. Say in alternate summers. Last summer I was favoring double-flap pocket solid-colored shirts when I bought my first kilt (an AmeriKilt). The first stranger’s comment I received kilted was not “the question” but rather: “Hey, you’ve even got the right shirt. Would you come with me so that I can show my husband? I want him to buy a kilt.” So I went and gave my first speech about kilts. Not a bad start as a kilt advocate, particularly as self-conscious as I was on my first public display.