This is a dark teal ink from Diamine. It reminds me of Pilot Iroshizuku Tsuki Yo. This a nice blend of blue and green with some grey undertones. It leans more towards the green end of the spectrum. It has an excellent dry time and the colour varies quite a bit depending on which nib size you write with. It shades from a dark green to a muted grey-green. Though Diamine has an ink named teal, there is a difference between the two. Twilight has more blue when compared to Teal. It’s a subtle difference but evident when in direct comparison.