Slate Green — Slate Green shares the muted blue-gray of natural slate stone, giving it its name. It belongs to the Green family: a medium-toned, muted tone with hex code #658D6D and RGB values of 101, 141, 109. Its dominant channel values give it a cool undertone that reads as muted rather than flat. Slate Green pairs well with natural wood tones and warm beiges and works nicely in graphic design projects. Nearest neighbors: sage.