This is the Pelikan 2018’s ink of the year. I got this ink initially thinking it will be a dark yellow-green. It does have a faint yellow undertone but Olivine is mostly a dark green with a strong grey undertone in. It shades well in my Japanese SM nib. Shading goes form a muted grey-green to a deep dark green. It feels like a lubricated ink and I really enjoy this colour. Check out Pelikan Edelstein Olivine if you enjoy a dark green ink.