The living room’s moody palette begins with Farrow & Ball’s Hardwick White on walls. Lush velvets—seen in an olive green Lee Industries folding screen, plus a Hickory Chair sofa and club chair—add sumptuousness. Arnold tempered these with clean-lined counterpoints, including Arteriors’ midcentury-inspired Griffith chandelier, an abstract oil-on-canvas by Giuseppe Napoli and a leather-topped iron coffee table forged by Farrer.