OK I'm home and now I can see everyone's pictures.
Sarah, See you like red and yellow accent colors, I think something in the yellow/gold tone would be beautiful for your wall paint in your living room, and then you can pop the color against your brown furniture with red accents. I love the wood floors that were posted (ok forget who posted them) I think that with just the right area rug would look really good.
If you don't like yellow/gold you could go with a coffee cream color and still pop it with yellow and red.
I guess the "right" way to paint walls is say if you have a blue room bedroom and a green den that are joining, for the bedroom your accent color would be green and the den's accent color would be blue, it helps make the rooms flow togther.
Amy, you have a very beautiful house.