Semi-formal head accesories

Recently shaved my head and feel like I am missing color on my head when dressing somewhat formal. I've gone with using beanies with sport coats for events which looks pretty good, and this is acceptable as I am in a creative field. I would just like some variation and options to use when for example wearing a full suit.

I've already ordered some bolder glasses but I'm not sure it will be enough.

It doesn't necessarily have to be about head accessories but any tips that help make my head less naked are appreciated!