I think that the tan, brown and Ivory fabrics are lovely! In fact as the theme seems to revolve around woodland scenes, perhaps they are the best colours? I like all of them...how about using them all or a couple of them to make multiple borders? They would go so well with the green that is already there. Perhaps the brown and tan or brown and ivory if you like the flying geese pattern as a border or part of the border and you could frame the flying geese strip with the 'odd one out' colour....