Monteverde Sapphire is a vibrant blue. It shades beautifully and has a wet flow. There is the tiniest bit of sheen in the darker areas where the ink had pooled, it is not obvious unless you are looking really hard.
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.