A departure from the home’s mostly cool, neutral palette, the den feels cozy in Farrow & Ball’s Bancha Green. The room’s clubby leather accents include nailhead-trimmed armchairs by CR Laine Furniture and an ottoman by Charles Stewart. Beneath Alexa Hampton-designed picture lights for Circa Lighting, a Hickory Chair sofa from A. Hoke Ltd. in Charlotte tucks into a wall of builtins. The animal-print rug is by Stark.