I’m about to rip out all of the door casings (eight doors) and baseboard in my hallway of a one-story ranch house. Over the past few years I have added oak casings and baseboard to the master bedroom and a second bedroom that I use as an office, plus the kitchen. This got me to wondering if all woodwork in the house should be the same, or if it is considered OK to have trim differ from room to room (oak in some rooms, painted wood in others). I’d like to put in bright white trim in the hallway in part because the hall is fairly dim, even during the day. The walls will be a light green; the hallway carpet matches the three bedrooms, by the way, and is a nice berber with a color called “oatmeal,” which gives you a fairly good mental picture. The living room has an original red oak hardwood floor with the original painted and overpainted trim. So, would the design gods frown upon me if there was a different trim from one room to another? I haven’t seen any guidelines in any of the books I have on hand.