If I wear them it is definitely under them. Yes color is important unless I'm cold and they won't be seen. In that case, texture or thickness is important. I prefer sheer to waist or control top. It depends on my mood and the day my body is having lol.
never ever wear panties undere the pantyhose because it will cause them to slide down and you end up with that droopy croch. if you must wear panties, wear a pair on top that hold the pantyhose in place but then wear sheer to waist, otherwise it look weird