I really want to paint our living room white on white with the patio doors in a black trim. I like the modern farmhouse look with a warm clean look. I have read I need to go with a warm white and stay away from gray, green and blue undertones in our north facing room. I do not want yellow or anything too beige. l like a somewhat subtle difference in the white trim and cream walls. We have glass front build ins, and white beams on an 8 ft ceiling. We have lots a large windows in the room. I know what I want but don't know how to get there, any advice or photos? In my area (Iowa) Sherman Williams and Ben Moore are available.