The 9 Best Cobalt Blue Fountain Pen Inks (2023 reviews)

Here, we review ink that manages to win our hearts. It's the pelikan cobalt blue fountain pen ink and it's widely considered as one of all-around great ink you can buy. The Pelican 4001 works perfectly with Piston filler, vacumatic or converter fountain pens. It comes in a bottle that looks great. The blue color is so bright and even and really pops off of the paper. It's flow from the pen and color on the page speaks for itself. The ink bleeds heavily when using the fountain pen initially, but will even out the more you write.

The Pelican is a great ink and this is a really classy color. It comes in different types, weights (thicknesses), porosities (absorbencies), textures (finishes), and qualities. It is good colors for writing on their own right.

Why We Like This:

Doesn't dry out at all quick like cheaper inks
Blue color is very nice and also acceptable for professional writing
Delivers what they promise

Best For signing certificates: Montblanc Cobalt Blue Fountain Pen Ink

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate ink. The montblanc cobalt blue fountain pen ink is exactly that - it's a simple ink that hits all the right notes. The functional design of the jar allows the ink to gather directly below the opening for a convenient refill / the vintage look of the ink pot lends exclusivity to any office desk. The bottle is heavy glass, shaped very cleverly for filling any pen down to the last few drops, and the cap is heavy, secure, and the fit and finish of the bottle is just excellent. The color is the deepest and darkest pure black.

This is a great color of blue for a fine or extra fine fountain pen nib. It also resists smearing or erasure from moisture once it has "set" for a few minutes. The bottle's unique shape is fun to display. The bottle is perfect for easy refills.

Why We Like This:

Bleeding, no ghosting, little to no feathering
Flows well, doesn't feather much on regular paper, no issues with bleed
Good brand reputation

Best For drawing: Parker Cobalt Blue Fountain Pen Ink

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Parker's inks are generally considered some of the safest to use and easiest to clean. It has high quality bottled ink with added lubricity for a smooth flow when putting pen to paper. It writes well, and the color is quite nice, plus 57ml of ink goes a long way.

This ink dries quickly on normal paper, but if you want to write on paper that has a little more texture, find that the ink will bleed. It leans slightly to purple (hence the name) and is a dry ink, good for pens that are too wet for your taste.

Why We Like This:

Gorgeous blue color, works well with parker
Includes one 57 ml bottle of blue ink
Elegant glass bottle with wide base and tight-sealing screw-top lid

Best For watercolor: Waterman Cobalt Blue Fountain Pen Ink

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The ritual of filling ink from a bottle enhances the noble experience of using classic fountain pens. This harmonious green fountain pen ink is non-permanent, so it is meant to be water soluble (not water resistant), which is the kind of ink that works best for keeping your fountain pen cleaner. Unlike a standard blue or black Waterman cartridge, which always has a thick, solid line, this ink in the converter often leads to thin lines that drop out completely. The ink writes smoothly and never clogs.

The waterman bottled ink is compatible with Parker pens and converters. It is smooth and easy flowing. The bottle design is cool because you can flip it in different directions. It isn't water-fast, and it will pick up other water-soluble colors you draw over, but those go hand in hand with its excellence in clean up.

Why We Like This:

Good ink, washes out of fabrics
Irish green is a nice dark ink that looks sophisticated
Lot of satisfied buyers

Best For Tomoe River paper: Pilot Cobalt Blue Fountain Pen Ink

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The pilot cobalt blue fountain pen ink should be able to handle its purpose and duties with ease. It makes your fountain pen work like a charm. It is a pleasure to write with them and they are suitable for all fountain pens. This is Japanese-made, and the Japanese really know how to make great pens and inks. It has more elements of green than blue with a touch of grey, a cross between turquoise/sage green with added grey to tone it down.

This ink is beautiful in color and flows very nicely with little to no feathering. There is no sheen or shimmer, so it doesn’t really smudge and it doesn’t gunk up a fountain pen. It takes some work to fill the converter and to keep it filled, but with this ink it is well worth that extra effort.

Why We Like This:

Great color, dries quickly, does not smudge
Very dependable and fountain pen friendly inks
Very nice ink, no surprises or disappointments

Best With feather: Noodler'S Cobalt Blue Fountain Pen Ink

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This Noodler's Blue ink is the essence of what a blue ink is supposed to be. It's everything you could want in a fountain pen ink. The ink stays wet in the pen when the pen is uncapped for a period of time, instead of drying immediately when exposed to air, and the ink dries on paper very quickly, and very seldom smears. The ink does have some subtle shading, even in a fine.

The blue is very dark, just a few shades off from black. The jar is clear except for the small label on the front, so its easy to fill your pen without making a huge mess. Even though the color won't turn any heads, your writing will have a noticeably greater depth than a regular ballpoint and/or gel pen would achieve.

Why We Like This:

Great vibrant color, flows smoothly, and shades nicely
Nice ink in texture and color
Flows great, dries quick and the color is beautiful

Best For felt Pen: Herbin Cobalt Blue Fountain Pen Ink

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Herbin is known for creating pragmatic and minimalist ink for people on the go, and its line of herbin cobalt blue fountain pen ink definitely falls in line with that reputation. This ink works great in the M805 which needs a wet ink to write it's best. It is a watery ink, but surprisingly deeply pigmented. It offers unparalleled writing quality and offers a delicate and homogeneous colour gradient. It is suitable for felt pen and reservoir brush, glass nib, reed pen, paintbrush, quill pen and nib holder.

There is a slight reddish sheen on Tomoe River paper, and no shading. It's a good, wet and water resistant ink. It is perfect for writing enthusiasts and lovers of beautiful letters. The colors are always pleasing and the flow is excellent.

Why We Like This:

Very deep, almost shading to brown
Fabulous dark blue ink with superior flow
One of the new comers and featured product

Best For Calligraphy: Asvine Cobalt Blue Fountain Pen Ink

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It's really a no-nonsense, everyday ink suitable in an office setting. It is made of high quality ink for smoothly flow, quick-drying, non toxic and ph neutral. It works well in a fountain pen without drying up and creating grains. It also has good sheen and wetness and behaves very well in terms of dry time.

Non carbon bottled ink will not clog your fountain pen, making ink flow smoothly and constantly through your pen. It is great for fountain pens. It has a nice blue color to it.

Why We Like This:

Smooth flowing and deep dark ink
Sheen and little shading on premium coated paper
Good flow, no feathering on non-premium paper
Created with the high quality bottled ink components to get vivid and stylish penmanship

Best For work Use: Diamine Cobalt Blue Fountain Pen Ink

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Compared with other ink in this category, the diamine cobalt blue fountain pen ink has a convenient design. This ink is good for normal writing, not just artwork. It is made from natural dyes. The colors are subdued, making them good for work use. The bottles are thin plastic so you can get a few refills from each. It has a wonderful red sheen. The color is very rich and beautiful. It is great to have something other than the usual black or blue. The bottles are not too small so you can get a few refills from each.

Why We Like This: