That’s the point of this. To find out where in that spectrum your vision lands, not to get a perfect score.
I guess that makes sense thinking about it now since it's not a deep blue, and there's obviously no red component, but I never thought of it as being defined as equal parts blue and green.
(Turquoise I would consider to be blue-green/both).
I’m sure you’ve had conversations where that’s the answer you want to give.
A test that allows an answer of neither would deliver more information (transition points and an error bar) without failing to identify a distribution in the population taking the test.
Realistically there is a broad range that we all can acknowledge is neither, but is instead teal, and forcing a binary choice means people just choose randomly.
I think the test can be fairly criticised on the basis that it is assuming everyone's psychological colour space has a discrete boundary between blue and green, which clearly isn't the case for some people (like you), but it is for others (like me).
Once I figured it, I tried it 2 more times ... and got different results :) but the new results were consistent.
But it cannot do that without bias, since people always have the third choice to drop out when they don't like their choices. There is also another bias, which is people will just select some random option when they want to say something equivalent to "blue-green" but don't have the choice, then they get a result biased in that direction but what has actually happened is they have given up. This random choice might be culturally biased towards people's preferred color. I personally selected green when that occurred for me and then just sat on green hammering that. Oh, I'm more willing to say green than other people? Meaningless, I wouldn't have called those colors green in a conversation.
When presented in a forum people also have the choice of criticising the false dichotomy which is what you are experiencing here. The point of posting it here is to get this sort of feedback, so...