Sap Green isn’t one pigment, but is an informal name for any number of muted green mixes that are meant to make natural-looking foliage greens. As opposed to Hooker’s Green, which is more of a middle green, Sap Green tends to be a bit more on the yellow side. Some formulations are yellow-green, and others are muted ochre-green. Sap Greens can therefore vary a lot from brand to brand. I’ll start by reviewing the Daniel Smith one and then compare to some other brands.