Old Holland’s Sap Green Lake Extra is one of the warmest, yellow-green sap greens we’ve tested, and it is a useful color for foliage. Stiff in consistency, this color is a strong tinter. Old Holland’s Sap Green Lake Extra is a blend of a yellow, a green leaning blue, and black. Sap Green by Old Holland is yellower than Schmincke’s Norma Sap green and Williamsburg’s Sap Green. Old Holland Sap Green is a bit more yellow-brown than Holbein’s Sap Green.