Thanks, this seemed obvious to me too. But I would add, this could apply to orange too - there are a lot of orange tones between yellow and red, and if you likewise wanted to determine your subjective boundary, which this is only about, you would be able to say "rather red for me" or "rather yellow for me", regardless of the intermediate color. Since the space of colors can be described as convex, so to speak, you can between every two arbitrary colors determine your subjective decision boundary, regardless of any color in between. The premise is just accepting to ignore those colors.

Yes, the middle color there on the results page is clearly "goluboy" to me, so I my line is at ~33%, in the middle between green and goluboy.

The person you were responding to said that cyan feels like a completely different color to them, neither green nor blue. I had the same reaction when it gave me a color that I immediately identified as teal, and I learned my colors as a monolingual english speaker in Ohio. Therefore the supposition that all English speakers see only blue or green is an oversimplification.

And this changes over time, because for me cyan IS a basic colour term and I'm a native English speaker.