B.H.
If all the walls are solid pink right now you can run a pience of painting tape horizontally across the room, then from that piece of tape going down to the base boards tape off thick stripes. Between that paint add the chocolate. Then add chair rail moulding to split off the difference. When you pull off the paint the area above the moulding will be solid pink and the area below will be pink and chocolate striped. We did this to my daughter's room with a light green (her favorite) and a sand white. It looks great and everyone just has a fit over it when they come over. It looks very professional. I'd be happy to e-mail you a photo if you like. Let me know.