Williamsburg’s Viridian Green is creamy, thick, dark in masstone, and more opaque than other premium brands. In general with viridian, we would advise making some samples and seeing how the paint dries, as sometimes the color shifts. Out of the tube this was the most emerald-hued, and in tints it initially looked as blue-green as Old Holland. However neither of these assumptions were quite true when dried. Since the color can change subtly with drying, it may also be helpful to do mixes with white and compare these with mixes of phthalo green PG7 and white. One can compare how these dry and how they age over the span of a couple of weeks. All that said, viridian mixes differently than PG7, which Michael Harding elucidates in his brand copy on viridian. In the lineup of viridian, Williamsburg’s Viridian is beautifully milled and has the deepest masstone. The most similar paint to this one that we have tried is probably M Graham’s Viridian, which is also smooth and has similarly colored tints. However Williamsburg is thick in consistency where M Graham’s paint consistency is loose and gliding.