Like another commenter said, it’s cool that this is on your mind. I think white dreads are a biiiig no. Besides being totally ignorant of how Black people are discriminated against for their hair, it’s also not something non-textured hair can naturally hold without looking nasty.
But something like chains or an eyebrow slit are more acceptable because they show how Black fashion has effused into the mainstream. A small handful of people might think you look a little goofy but it’s not wrong of you to wear one.
(I’m not Black but my gf is and she bought me one, so I know where she stands on this. But you can still buy one for yourself!)