I mean, a good test would be able to detect that neither-blue-nor-green range and approximate midpoint as well, and it should be fair to say the midpoint is indeed the threshold between blue and green. (I don't think the current version of test can do this, though.)
I actually checked that at the end of the test (when it shows the gradient image with the response overlay).
There were two distinct points, one for blue and one for green, where my mind would place the transition to the colour in between.
(And yes, on one end it's bluer and on the other end greener, but (much like a shade of orange is neither red nor yellow) the colours are still not either green or blue.)
