Given that the syle of the building is uncomplicated, I would try to keep to that concept. Also, given that your home was built in 1870(ish), she is, in fact, a lovely little old lady--dressing her up in short-shorts and blue eye-shadow would, I think, take away from her simplistic beauty.
What strikes me right off the bat tho, is the lack of shutters. With stronger greenery directly around the house, even perhaps a heritage climbing rose (note the end with the shrubs on it; does not leap out quite so nakedly as the front which has no shadowing and no protection from your eye), and with the addition of shutters, which would break up the "whiteness" of the siding, you may not end up so blinded as you move up the driveway. Also, if you plant more greenery (trees, shrubs) farther away from the house (between your driveway and the house), you create yet another element for your eye to be drawn too--it would de-emphasize the building itself.
The storm door also adds a splash of something nice.
The other thought is to paint her barn red--but this looks best (I think) if the house is the only building in site and offers considerable variation in greenery and dramatic views around it. But then, I don't know how far back the color red was used on the exterior of farm houses.