I am painting the crown moldings, doors and triims in my house. All the walls have wallpaper. Different types.

The mouldings look like they have yellowed haven't been painted in many years. They look white but not a bright white. Also when touch them they don't see to be semi-gloss, nor satin but I dont think its flat either. I need some advice on the finish and possible shades of white. My wife feels that moulding should blend in with the wall paper(subtle) but I think they should be bold and accentuate the wall. Why have crowns like these that you dont see when you enter the room. BTW I am the home owner on lock down doing this. lol