What do you wear to a funeral?

i have a funeral on thursday. I borrowed this really cute gray shirt that is dress length. it goes a little above my knees and has lacy criss cross straps. It is not really showy or anything and the straps are not noodle straps.i have a bra that criss crosses too so you wouldn't see it. I was going to wear it with black leggings and flat black shoes. is this ok or do you think it is not appropriate?