I have a split level and am trying to come up with a good paint scheme for the upper floor. My kitchen, dining area, and living room all kind of flow together. No actual door between them. There is a half wall between the cooking area and the living room and basically you move from the kitchen through the dining area to the living room around that half wall. I also have vaulted ceilings.
We are getting complimentary colors and right now have two but i am thinking I could run into too much of one color using that. We already have the kitchen painted red on three walls and we are going to use an olive shade on the fourth wall that faces kitchen, dining, and living room. This is probably not the forum for this question so where could someone go online to assist with how to paint these rooms to complement each other but not "look the same"?
I painted a family room for a client a few years ago. At each corner, I painted a vertical band of varying widths. Everyone that saw it thought it was a great idea. This might be useful for your application. Use a darker tone of the same color and paint a fairly wide band to distinguish between the rooms.
here's a pic...