guess the ink!

[DrPenfection]

Callifolio Blue Pacifique
Callifolio Blue Atlantique
Callifolio Blue Mediterreanee
Montblanc Unicef Blue

[Darla]

Herbin Bleu Calanque?

Lamy Amazonite?

Iroshizuku Ku-jaku?

[DrPenfection]

Waterman Inspired Blue
J. Herbin Bleu Pervenche

[DrPenfection]

Noodler's Revolution Blue

[DrPenfection]

I am not sure if someone already said this

Noodler's Legal Blue
Noodler's Turquoise

[DrPenfection]

KWZ Hawaii Blue

[DrPenfection]

Pilot Iro Ama-Iro

[DrPenfection]

I am sure that Ptero has already said this -

Coloverse Crystal Planet

[DrPenfection]

Noodler's Lightening Blue (but this could be too light)

[DrPenfection]

oh, oh, oh - it has to be . . . .

Kiwi Inks Hyacinth Macaw

[mizgeorge]

Noodler's Midway blue

[DrPenfection]

(now back to reality) . . .

Sailor Manyo Sumire
Sailor Manyo Konagi

[DrPenfection]

Diamine Eau de Nil (not sure about this one - may be too teal but I will throw it in)

and we can't forget
GvFC Turquoise

[DrPenfection]

I could go on and on and on through my swatches, but I think I had better give others a chance . . .

[Yazeh]

None of the above.
It's not Noodler's. Not Montblanc...

[Pterodactylus]

Herbin Vert Reseda?

[Yazeh]

Not a Herbin ink

[Pterodactylus]

Diamine Aqua Lagoon?
Kaweco Paradise Blue?
Faber Castell Turquoise?
Diamine Marine?

Or maybe a discontinued one like
Caran d‘Ache Carribean Sea?

[Pterodactylus]

Colorverse Gravity Wave?

[mizgeorge]

Colorverse Rainy Day