[Grimblewald]

Agree, this seemed silly. It seems to be more a question of "would you say turquise is blue or green?" Rather than a question of our blues match. Better imo would be to ask something like paired colours and pick the "more blue" one. Cool idea for a website, but imo poorly formulated.

[martin-]

But if cyan for me is blue, and for you it's green, or neither (though that option is not available in this test), then that DOES tell us if our definitions of the word "blue" match. For me, the concept "blue" covers the cyan part of the spectrum, while for others it clearly doesn't.

[Grimblewald]

A neither option would also work. Point is half the colours i was shown fall into neither