Imperial Purple is from the Colour by Nature palette, created in collaboration between Farrow & Ball and the Natural History Museum. It\'s a deep, intense indigo that appears almost blue in some lights. It has an undeniably luxurious feel that\'s apparent whether it\'s used all over, as a rich wall colour, or in smaller quantities, such as inside a cupboard or on a piece of furniture.Exterior Eggshell brings long-lasting colour to outdoor spaces with a finish that remains flexible once dry, protecting wood and metal surfaces through changing weather. Added preservatives help to prevent the growth of algae and fungi, and the resin-rich formula resists flaking, peeling, and fading for up to six years. Providing it has been applied in accordance with Farrow & Ball Product Advice Sheets. Not suitable for use on exterior plastic surfaces or decking.