floor moulding door trim

According to Miss Manners, yes, to entertain with mis-matched trim you would be dropped from the invitation list for the upcoming social season. You'll find yourself sitting home alone on New Year's Eve.

Just use a little common sense. If one is painted, both probably should be painted If one is rather gaudy, the other may look out of place if a plain clamshell. Your house, your rules, but you probably want something that complements the style of the house.