This is a grey-blue ink from Diamine’s massive ink offerings. It’s really similar to Akkerman Laan Van Niew Oost Indigo. There were rumours that Akkerman’s inks were made by Diamine. You can decide for yourself. It’s a rather pleasing shade of blue, not too boring. It shades from a dark blue to a matte grey-blue. It’s a good corporate use ink. Plus it has rather good dry times on Kokuyo paper.