Black wing collar shirt

[DyerStraits]

Black formal shirts--in all collar styles, including band collar--are generally very adaptable and appropriate for most Highland formal wear, in my opinion. The tricky element is neckwear: if it is very formal however, I would definitely opt for a white shirt and black tie. For anything less, a black shirt with any type of collared shirt (spread collar, Windsor collar, pin collar, tab collar, Eton collar,etc.) will work, with a visually appropriate/contrasting solid color necktie.