Inktend / Ink library / Cobalt Blue

Yookers

Cobalt Blue

Blues & navies#0005BB

Yookers is one of the 713 brands in Inktend's built-in ink catalog.

Track this bottle → Find this ink ↗Also on Amazon

As an Amazon Associate I earn from qualifying purchases.

Specs

Color familyBlues & navies
Approx. hex#0005BB
SheenNot typically noted
BrandYookers

Paper & pairing

Blues and navies are the most broadly "safe" fountain pen colors: legible, professional, and unlikely to raise eyebrows in an office. This ink will behave predictably on most fountain-pen-friendly paper. Cheap, highly absorbent paper (standard copier paper) will dull any ink's saturation and can cause feathering or bleed-through with wetter nibs.

Own a bottle of Cobalt Blue?
Track fills, remaining bottle life, and your real paper swatch in Inktend.
Track it →

About Yookers

Yookers is a French brand best known for the Yooth, a refillable fiber-tip pen that runs on standard international fountain pen ink cartridges and uses replaceable felt tips in several widths, letting fineliner-style pens write with any fountain pen ink. The company also offers fountain pen versions of its designs.

France Founded Unknown
See all Yookers products →

Storing and using the bottle

Bottled fountain pen ink has an effectively long shelf life when kept capped and out of direct sunlight: most inks remain usable for years. The main risk isn't the ink spoiling, it's a pen sitting inked and unused for weeks: that's what causes clogs, not the ink's age.

Frequently asked questions

What color family is Cobalt Blue?
Cobalt Blue falls into Inktend's blues & navies family based on its typical swatch color.
Does Cobalt Blue have sheen?
Cobalt Blue is not typically noted for sheen. If you want that effect, browse similarly colored inks tagged with sheen in the ink library.
How should I store a bottle of Cobalt Blue?
Years, easily, as long as it stays capped and out of direct sunlight. The thing that actually shortens an ink's usable life is sitting unused inside a pen, not sitting on a shelf.
What paper works best with Cobalt Blue?
It behaves predictably on most fountain-pen-friendly paper. Stick to something reasonably absorbent-resistant, since cheap copier paper dulls saturation and can feather.

Similar shades By colour distance

Jules Verne Deep Sea Blue
De Atramentis
Maha Blue
Frara Road
Cartridge - Blue
HEMA
Ohio River Tributary Twinkle
Birmingham Pen Co.
Old version - Azul.
Compactor
Original - Blue
YIWU INSAITENG

Color shown is a close digital approximation of a typical swatch, not a calibrated color match.