The Unwatermarked Queen Victoria First Waterlow Issue of Niger Coast Protectorate Part Three - The 1d Blue
Gibbons lists a pale blue and a dull blue shade for this stamp, though in reality, there are at least 7 shades that I have been able to identify. Four of these would be classified by Gibbons as pale blue, while the other three would likely be classified as dull blue. However, it is clear that there should be more shade groups included in the catalogue, since some of the stamps here completely do not fit either shade name.
The scans below show the shades I have identified:
The first stamp on the left is a perfect match to Gibbons's Prussian blue. The second stamp from the left is a little brighter, being a very close match to deep dull blue on the Gibbons colour key. The third stamp from the left is brighter still and a lit…