100%. It's like being asked is this black or white and being shown 50% grey.
It’s not really the same, because black and white strongly connote being at the far ends of their continuum (lightness), and are thus opposites, whereas blue and green are more vaguely specified as nearby spots on their continuum (hue).
Yeah, but is the gray to you more look more black or more white? That's the point.
That is the point of the exercise though. Is 50% really where you draw the line?
That’s the point of this. To find out where in that spectrum your vision lands, not to get a perfect score.