Diamine Prussian Blue is a unsaturated blue (blue black?) that feels a little on the dry side in a fine nib. It feels fine in a medium nib.
This wasn’t the colour that came to mind when I think of Prussian blue so I was a bit disappointed when I first used it. This colour made me think of old, faded jeans. After using it for a while, I started to enjoy the ink, as long as I no longer think of it as Prussian blue. I also felt it looked especially good when using for sketching.
This is written with a TWSBI ECO-T medium nib.
Disclaimer: This ink was purchased by me and all opinions/photos are my own. This post was not sponsored.