Pairing well with silver, pewter, gold, wrought iron, or brass hardware, Castle adds warmth without overpowering the space. Meanwhile, homeowners and designers alike are feeling the urge to bring the outdoors in, and the warmer blonde of River Rock does just that. Typically used as an accent color on an island or a base perimeter wall, Nightfall has become the focal point for most of the cabinetry when paired with white upper cabinets and countertops.