The neutral colors and materials that camouflage the house are interrupted by the distinct yellow hue of the staircase — a part of the house Gluck says should be embraced.  Just as the ladder is the entrance to the tree house, so the staircase is part of the conceptual experience of being up in the trees.  “There is a playfulness to the thing, that you are going to walk up four or five flights of staircases on your relaxing weekend, so we painted the stairs yellow to highlight that sudden exposure,” Gluck says.