This is one of the newer Graf von Faber-Castell inks. Yellow-greens especially darker ones have always been my favourite range of colours. Olive Green is unsurprisingly totally my cup of tea. Filling it in a wet nib the Pilot Custom 823 Waverly nib is the best combination. How this ink shades! It goes from a dark almost black green when ink pools to a muted lemon grass green sort of green. I really enjoy this ink a lot. It writes a little on the dry side so pair this ink with a wet nib.