Sap Green is from the Colour by Nature palette, created in collaboration between Farrow & Ball and the Natural History Museum. It\'s a true olive green, much earthier and warmer in tone than the other greens in the Colour by Nature palette. It makes a great starting point for a Mid-Century Modern colour scheme, and looks particularly rich in smaller spaces.Estate Emulsion is Farrow & Ball\'s signature finish for interior walls and ceilings. Its distinctive chalky matt finish minimises imperfections, and scatters light to fully express the depth of their colours. The flat, velvety effect it creates even brings added richness to darker colours.