It’s interesting that I came across this right now because literally at this moment I was fiddling with different blues to try to blend for the specific purples and greens I need for a fish painting I’m doing right now. (This is what I do for a living now)

At top is “ultramarine blue” (originally made from crushing lapis lazuli). Then clockwise from there “cobalt blue” (made from cobalt aluminate CoAl₂O₄) and “phthalocyanine blue”(C32H16CuN8).

If I want a clean green I’d avoid ultramarine blue because it naturally leans toward red which is opposite green and would muddy it. Phthalo blue might be a better choice to make green, but itself leans yellow.

So having a new blue, which looks to be a very pure and true blue, is really interesting to me as an artist. I’d love to try it, but it looks like it’s going to stay pretty expensive.

For reference in use, here are different uses where subtly different blues were important to my finished product.