|Many thanks to B. for color correcting the above pic. This looks much better.|
Here's a comparison of Diamine Sargasso Sea with a few other blue inks that I thought was interesting.: Everflo's True Blue, Noodler's Henry Hudson Blue, and Noodler's Manhattan Blue. Henry Hudson, which Noodler's makes for the Fountain Pen Hospital, has much more purple in it, while the Noodler's Manhattan Blue (for Art Brown) has more black in it. Everflo's True Blue is lighter and, like its name, a truer blue. Sargasso Sea is much darker, but there's also a brightness to it that I like.
Sargasso Sea is a great addition to the Diamine line up, take a look at their other new colors as well over at JetPens.