I have found a record in FO4edit under Layer called workshopPOILayer, which I don't know how to disable/modify cause I'm a noob. there is also an entire section, VATS, in fallout4prefs.ini which has RGB values for things like fModMenuEffectColor, but they don't seem to affect anything, not even if I delete them and set the inis to read only. Maybe someone more capable than me can take a look.