Painting - Trim Painting Transition

When painting the doorway trim from one room into the next room sharing the same entrance, what do you paint the inside of the archway? For example, from the hall the trim would be brown and flooking out of the other room the trim would be blue. But what is the suggest way to paint the inside of the archway? Would it be brown because that's what you see when looking down the hall or blue because that is what you are entering into. More importantly how about the other rooms that lead form one room to the next in the family areas such as the kitchen, living room, etc?

But what is the suggest way to paint the inside of the archway?

Whichever way tickles your fancy. :) You would probably want the bigger room to have the color of the archway but if is an entrance hallway you might want the hall to be dominant. One other solution is to paint all the trim the same color. Just be sure to pick a color that would cordinate with the other colors.