Newfoundland Caribou Issue - Prussian Blue?

I acquired a Newfoundland collection, and the second stamp is described as the Prussian blue shade. Unitrade only lists two shades, dark blue and Prussian blue. As these are distinctly different, can I assume the second (lighter shade) is the Prussian blue?

Thank you in advance for your input.

Judging by the image on Arpin Philately's website, the one on the right's Prussian Blue, i.e. the darker less saturated colour.

A certified Prussian Blue courtesy of Seigel:



Keep in mind the usual caveats about colors and monitors/scanners etc.

Siegel's the centre stripe, Prussian Blue at the top, Dark Blue at the bottom.

This is Cornelissen's image of Prussian Blue; they're an artists' supply shop in London.

As with all of these "color" comparisons, I warn that with using these images, the sources are not calibrated to a standard shared by all images. My point is that the actual stamp colors may be (1) different than what we see on our computer or mobile device, and (2) if they are not shown side-by-side from the same photo or scan, the comparison is not valid.

Impossible to tell from a scan but a modern analysis suggests they are all Prussian Blue, and that the difference in hue arises from the fineness of the pigment grind. I do not have a link or reference at hand sorry.

Link to a similar thread in this forum - it has been discussed in the past.

https://goscf.com/t/73826

Also, it's better to think of Prussian Blue as a chemical compound rather than a shade variant, as it was among the very first synthetic pigments.

Stanley Gibbons calls the two shades Indigo and Prussian Blue, but your scans look more like Greyish Blue and Blue-Grey to me.

NSK's laughter is understandable, because it's ridiculous to try to tell the difference from a scan. If you examine the stamps in bright daylight but not direct sunlight, and compare them with certified reference examples, you may find an answer. Or not. But you'll still be the owner of two beautiful little works of art.

It was more about the nonsense in the preceding post.

NSK- so you kind of missed my point by a mile, then. Figures…

As pjr states, it is ridiculous to try to tell the difference, from a scan, on the internet, Even when the actual pigment is illustrated, it still don't look right (the point of including the Cornilissen patch).