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Scored a 70 with my less-than-great laptop screen.

The problem with any of these online tests is that it is skewed based on your monitor, graphics card, OS, and browser settings.

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You are right, at least, regarding the monitor. I tried two monitors (other factors being equal), got 28, 4, 68 with Dell IPS LCD, and 31, 11, 78 with Samsung TN LCD (paired t-test p-value=0.08). It might be that amount of light or time of day is another factor introducing variance.

it's also skewed by how much effort it takes to move those things around, and what you understand by "hue".

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