Incidentally I've done the test multiple times. Sometimes my turquoise is blue. Sometimes it's green.So it's clearly not brilliant. Fun, but not conclusive.
It's not meant to be conclusive, I don't think. Firstly, turquoise is both blue and green, not one or the other. Each of us will perceive it differently according to internal stuff in our eyes and your colour perception, probably things like if you're wide awake or sleepy after a long day, with a headache, etc, etc, egc. And also external factors like the colour resolution on your device, whether you're using high availability settings or anything, whether you have a light or dark background, whether you're outside in full sunlight or in cloud, or inside, with no natural light, with dim or bright lighting, cool or warm spectrum bulbs.
Basically, there are so many factors which will affect how you perceive colours, particularly subtle differences in shades and hues, that you won't get the same result every time - which is what makes it interesting.